Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f442ddb2e7d79fc…

MALICIOUS

PDF

27.6 KB Authoring application: Pdftk
MD5: 890dc7d43c05e6912e83a6678090a4f5 SHA-1: f730a1867e455c342aa767651908ac79f813e201 SHA-256: 4f442ddb2e7d79fc593d763f45f9e5f90d129ff8b62b5c520f7def3df561f204
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent. The document body, while containing unrelated text, also embeds multiple URLs that form part of this link farm, suggesting a phishing or malware distribution scheme.

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 https://jufinavunuzofiw.weebly.com/uploads/1/3/0/2/130271126/237903.pdf
    • http://mycubbylife.com/uploads/1/3/0/3/130379062/ac42f197049e.pdf
    • http://rootfivefarm.com/uploads/1/3/0/6/130639812/43309.pdf
    • http://kateycrews.net/uploads/1/3/0/2/130272516/porerok_zegiwami.pdf
    • http://flewka.ru/uploads/2020/01/29/90d81c9c.pdf
    • http://amandapetersenfails.com/uploads/1/3/0/5/130539204/57d3c22a52c7a49.pdf
    • http://mirrorimagemissions.com/uploads/1/3/0/4/130483288/130483288.html#brown+platform+sandals+outfit

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001043.bin
6aeeb4413128987ef0744a39a951ffee522681bf3b572582a5ce5cda0df0efba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1043 7188 bytes

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