THREAT REMOVAL

.pdff Ransomware — How to Remove Virus Infections (+ Decrypt Files)

This article will aid you to remove .pdff Ransomware. Follow the ransomware removal instructions provided at the end of the article.

.pdff Ransomware is one that encrypts your data and demands money as a ransom to get it restored. Files will receive the .pdff extension. The .pdff Ransomware will leave ransomware instructions as a desktop wallpaper image. Keep on reading the article and see how you could try to potentially recover some of your locked files and data.

Threat Summary

Namepdff ransomware
TypeRansomware, Cryptovirus
Short DescriptionThe ransomware encrypts files by placing the .pdff before the affected files on your computer system and demands a ransom to be paid to allegedly recover them.
SymptomsThe ransomware will encrypt your files and leave a ransom note with payment instructions.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware

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Malware Removal Tool

User ExperienceJoin Our Forum to Discuss pdff ransomware.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

.pdff Ransomware – Update January 2019

There is a decrypter tool released for STOP ransomware’s .pdff Ransomware variant. The tool was initially released for the .puma, .pumax, .pumas versions of the cryptovirus. Michael Gillespie has updated it to also support .djvu, .djvuq, .djvur, .djvut, .djvuu, .pdff, .tfude, .tfudeq, .tro, .udjvu, .tfudet. You can download the tool via the Decryption Tool link here. The tool requires a pair of an original file and its encrypted version.

.pdff Ransomware – Distribution Techniques

The .pdff virus is a newly found ransomware which has been identified in a small attack campaign. It appears that the captured samples associated with it are testing releases. Due to the fact that the number of deployed viruses is relatively low the analysts cannot determine which would be the main delivery methods when the final version is ready.

One of the main sources of ransomware attacks is the coordination of email phishing SPAM campaigns. They are designed to appear as being sent by legitimate services or companies that the victims know and trust. Most of them even feature hijacked design elements such as images and layouts to make them more believable. The actual .pdff ransomware files are directly attached to the email messages or they can be linked in the body contents. Another method that can be used by the hackers behind the malware is to construct malicious web sites that imitate legitimate and safe portals and download sites, as well as software landing pages.

The .pdff ransomware can also be found across all content found on file-sharing networks like BitTorrent where pirate and legitimate data is distributed.

Victims can get infected by acquiring payload carriers of which there are two main types:

  • Malicious Documents — The hackers behind the .pdff ransomware can produce documents containing the necessary commands with all popular formats: spreadsheets, presentations, text documents and databases. When they are opened by the victim users a notification prompt will be spawned asking them to enable the macros, usually the reasons quoted are to “correctly view the document”.
  • Application Installers — The criminals can take the legitimate setup files of popular applications and modify them with the virus installation code similar to the documents. Usually packages that are chosen include the following: system utilities, creativity suites, productivity applications and office tools, as well as computer games.

Larger infections can be caused by malicious web browser plugins, alternatively known as hijackers. They are mostly found on the relevant repositories with fake developer credentials and user reviews. When they are installed changes to the browser settings will be made as well in order to redirect the victims to a certain hacker-controlled page: the default home page, search engine and new tabs page.

.pdff Ransomware – Detailed Analysis

The security analysis of the .pdff ransomware is not yet available however the preliminary information about it shows that it must be related to the recent .djvu virus releases.

Related:
What is .djvu files virus?How did it infect the system?How to remove its malicious files from system?Is there a way to restore .djvu files?Find all answers

.djvu Files Virus – How to Remove It

As these infections are still in an early release they do not contain any modules besides the encryption component. We expect that future versions of it might base themselves on advanced ransomware and thus have a much larger set of attack capabilities. Some of the essential ones are the following:

  • Data Harvesting — The .pdff ransomware engine can be programmed to scan the memory and hard drive contents for information that may be useful to the attackers. Usually this consists of a report of the installed hardware components, user configuration and Windows registry values. In certain cases they can also be programmed to steal user data that can directly expose the identities of the victims: name, address, phone number, location, interests and even any stored passwords.
  • Security Bypass — The collected information about the compromised computers allows the engine to identify if any security software or services that can interfere with the virus operations is installed. Their real-time engines can be bypassed or completely removed.
  • Process Hookup — Many of the malicious engines can hook up to already running programs and services, this is done in order to acquire information about the users activities.
  • Windows Registry Modifications — The .pdff ransomware may impose Windows Registry modifications both to the operating system and the third-party installed applications. In both cases this can lead to severe performance issues and system stability along with the inability to launch certain tasks or, services or applications.
  • Persistent Installation — The .pdff virus can be installed in such a way that makes recovery very difficult through manipulation of boot options, system configuration files and Windows Registry values. Whenever the computer is started the infection will be triggered. Another factor is that most manual user removal guides will be rendered ineffective as the virus can block access to the relevant recovery menus.
  • Trojan Connection — In certain cases the hackers can embed a Trojan module which is able to establish a secure connection to a hacker-controlled server. It would allow the hackers to overtake control of the infected machines, spy on the victim users and steal user data before it is encrypted.

Many viruses like the .pdff ransomware have the ability to infect the computers with other malware. Possibilities include cryptocurrency miners, hijackers and redirects.

.pdff Ransomware – Encryption Process

The .pdff ransomware encrypts user data with a strong cipher according to a built-in list of target data extensions. In most cases it will target the most popular ones:

  • Archives
  • Backups
  • Documents
  • Images
  • Videos
  • Music

The victim files will be renamed with the .pdff extension and a ransomware note added to coerce the victims into paying a decryption fee to the hackers.

Remove .pdff Ransomwareand Try to Restore Data

If your computer system got infected with the .pdff ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.

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Martin Beltov

Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


OFFER

REMOVE IT NOW (PC)
with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy


Windows Mac OS X

How to Remove pdff ransomware from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove pdff ransomware

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall pdff ransomware and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by pdff ransomware on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by pdff ransomware there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for pdff ransomware with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by pdff ransomware.

Ransomware infections and pdff ransomware aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Windows Mac OS X

Get rid of pdff ransomware from Mac OS X.


Step 1: Uninstall pdff ransomware and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to pdff ransomware:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to pdff ransomware. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to pdff ransomware. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove pdff ransomware via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as pdff ransomware. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Click the button below below to download SpyHunter for Mac and scan for pdff ransomware:


Download

SpyHunter for Mac



Step 3 (Optional): Try to Restore Files Encrypted by pdff ransomware.

Ransomware infections and pdff ransomware aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


pdff ransomware FAQ

What is pdff ransomware ransomware and how does it work?

pdff ransomware is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does pdff ransomware ransomware infect my computer?

Via several ways.pdff ransomware Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of pdff ransomware is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .pdff ransomware files?

You can't. At this point the .pdff ransomware files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .pdff ransomware files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by pdff ransomware ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".pdff ransomware" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .pdff ransomware files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of pdff ransomware ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate pdff ransomware ransomware and then remove it without causing any additional harm to your important .pdff ransomware files.

Also, keep in mind that viruses like pdff ransomware ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

2 Comments

  1. Avatarthyago

    Hello, how are you? unfortunately I got this pdff virus
    I’m desperate, help me?

    Reply
  2. Avatarcipzilder

    i has try stop decrypter tool, but i got log “No key for ID: 4bv7VViMdi9daNlbKoU2ls0g8SnsfMMkXirSdKFr”…please help me…

    Reply

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