Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2a68f8f4205754…

MALICIOUS

PDF

37.1 KB Authoring application: LibreOffice
MD5: aeea76b1057bbe494541ec3776dcc2b5 SHA-1: cc501f698a66d9d402af93048e6ddca4d8edf7d4 SHA-256: 9b2a68f8f4205754abbd57676a2e668d9d7444161f9f885bfe4d6e6e8cc47605
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm and a high ML score, indicating malicious intent. ClamAV also detected it as 'Pdf.Phishing.TtraffRobotInstall'. The document body contains numerous embedded URLs pointing to external PDF files hosted on various domains, suggesting a phishing or malware distribution scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mengdid.com/uploads/1/3/0/6/130640006/4568960.pdf
    • http://girlfriendsfitnessparsons.com/uploads/1/3/0/6/130603740/5c7dfdf4.pdf
    • http://southeasternclubcl.com/uploads/1/3/0/6/130620380/pejagexuzipuruze.pdf
    • http://pudgery.com/uploads/1/3/0/4/130483132/4843429.pdf
    • http://growthdemons.com/uploads/1/3/0/5/130543020/19d7ee0cff.pdf
    • https://jojazuvisanipe.weebly.com/uploads/1/3/0/5/130544872/cce1bdb5f838f1b.pdf
    • https://levikujakezodu.weebly.com/uploads/1/3/0/4/130476821/42f790.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/7/130739405/130739405.html#tree+diagram+prepositional+phrases

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001150.bin
f08add2c4851b8417ab2e89f2938ada714b665ac5a4635b9e0f0dba0ef081686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150 8252 bytes

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