Ransomware Research

About Pdf


Pdf was first discovered in January 2023 in enterprise cloud environments.

Name Pdf
First Seen January 2023


To better understand Pdf, we can trace it’s origins. Below is a snapshot of Pdf’s genealogy.

Dharma » Pdf

Behavior of Pdf

Pdf is known to target specific file types. Below are all known file types that Pdf is known to infect.

In some cases, ransomware will update the modified date, when it encrypts files. Pdf updates the last modified date of the file it targets.

Learn More

Characteristics of Pdf

Here are some of the unique characteristics that are helpful to know about Pdf.


Some ransomware will change or append a suffix to the end of the file after they are encrypted, including changing the extension of a file. Here are some of the possible suffixes that Pdf ransomware is known to change.


Ransomware Notes

Not all ransomware leaves a note. However, some ransomware leaves the infected party instructions on what the user should do to get rid of the ransomware, or satisfy the ransom. This often involves transferring money, often bitcoin or another cryptocurrency to a designated wallet.

Below are the type(s) of notes, content, and typical locations where Elastio has found ransom notes from Pdf.

LocationRootDiscs, Desktop
File NameInfo.hta
LocationStartUp, Roaming


These are the names of the executables that contain the undetonated ransomware payload for Pdf.

ExecutablesStrm, Strm.exe

External Pages

Ransomware often links to external pages such as payment pages, telegram contacts, etc. Below are some of the URLs Elastio has found to be associated with Pdf.

External Pages
  • mailto:3442516480@qq.com
  • mailto:1169309366@qq.com
How Elastio can help

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Elastio is a cloud-native data resilience platform on AWS, providing robust security and assuring the recoverability of critical data in cloud environments.

Elastio protects data from ransomware and malware evading perimeter defenses and mitigates downtime, data loss, and reputational harm for businesses.