Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9bf7d5cbee62d0…

MALICIOUS

PDF

32.9 KB Authoring application: ImageMagick
MD5: 978b5712a3d8bf67883514f6cf141265 SHA-1: 45466ec601a437131b52b29722384c2a053e254d SHA-256: 3f9bf7d5cbee62d09b80e75b6aa4d6aa4cf49a3b7e636cf57b0cc556be39dcaa
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier's high confidence score further support malicious intent. The document body itself is largely unreadable but contains references to external PDFs, aligning with the link farm heuristic. The primary attack pattern appears to be a lure to a network of malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bernardobellostudio.com/uploads/1/3/0/5/130589299/085e3182.pdf
    • http://rogerspma.com/uploads/1/3/0/6/130621826/854fd9b3656261.pdf
    • https://wejaxibaran.weebly.com/uploads/1/3/0/2/130289240/fojuzagawito.pdf
    • http://thehappyhedon.com/uploads/1/3/0/3/130313305/lujakudepeguk.pdf
    • http://stubblefieldhoa.com/uploads/1/3/0/5/130589061/8bae9.pdf
    • http://lixizaju.bolezni-zhivotnyh.online/uploads/2020/01/29/pilajovudezanejeran.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/5/130588964/130588964.html#1988+mazda+b2200+manual+transmission+fluid

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112f.bin
5779a751744d4d5675fca65350c49fbc54494025580c850f5aa08211dc34c10c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F 8556 bytes

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