Malicious PDF — malware analysis report

Static analysis result for SHA-256 5225a8f62d0d9d9c…

MALICIOUS

PDF

36.0 KB Authoring application: LibreOffice
MD5: ef2f49d34b7edd9b28afa0c3673faaad SHA-1: f0277a42d4d9ce3a939815e4ceede5208c9a868b SHA-256: 5225a8f62d0d9d9c03947e763fefbc0fdd2b4a94fec18d6d4eeddf4330f78811
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flagged this file as malicious, specifically as Pdf.Phishing.TtraffRobotInstall. The document body, though partially corrupted, mentions improving writing skills, which may serve as a lure. The primary attack pattern involves redirecting users to a link farm, likely for SEO manipulation or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ukuleleadventure.club/uploads/1/3/0/2/130289519/7293935.pdf
    • http://laurenvanmullem.com/uploads/1/3/0/5/130542953/89e25270d9b17.pdf
    • http://snobz.co/uploads/1/3/0/6/130639924/3209597.pdf
    • http://365poolspa.com/uploads/1/3/0/4/130483329/5f068db57a.pdf
    • http://nsngames.com/uploads/1/3/0/4/130494289/1060946.pdf
    • http://bluecrabkeyflorida.com/uploads/1/3/0/8/130813972/bexizoveje.pdf
    • http://firstchoiceconstructionservicesllc.com/uploads/1/3/0/7/130740342/3e17a62.pdf
    • http://northshorecleaners.net/uploads/1/3/0/6/130604807/vunebokone.pdf
    • http://februaryvioletphotography.net/uploads/1/3/0/7/130738596/mowuvaxoxu-mavagemapalo.pdf
    • http://1ststeptolife.com/uploads/1/3/0/5/130538992/9cf664a38.pdf
    • http://capptivatebeacons.com.au/uploads/1/3/0/2/130272232/nixage-tuvidi.pdf
    • http://sdbau.shop/uploads/1/3/0/7/130738759/talifeb.pdf
    • http://armidalebushwalkers.org/uploads/1/3/0/5/130542780/4992798.pdf
    • http://charlesandblanca.com/uploads/1/3/0/7/130775247/65ee1c36.pdf
    • http://panspermia.net/uploads/1/3/0/2/130272330/3137156.pdf
    • http://beavercrossministries.com/uploads/1/3/0/5/130551483/rifexov_govad.pdf
    • http://watercolorcreativitylessons.com/uploads/1/3/0/4/130488820/ffb85f.pdf
    • http://newbist.com/uploads/1/3/0/3/130379596/fukexusa.pdf
    • http://applicationclicks.com/uploads/1/3/0/8/130873927/8392982.pdf
    • http://74-123-75-25.mgwnet.com/uploads/1/3/0/7/130776564/130776564.html#how+to+improve+writing+skills+in+college

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f90.bin
8db1d7d3d381737e247454ed312956217d202e89e58383ac907c8866ea31855b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F90 7568 bytes

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