Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b99e45da46ddea…

MALICIOUS

PDF

36.1 KB Authoring application: Mobipocket Creator
MD5: 4e6552923e308175e7646a65960e2b5a SHA-1: d3e9f20f6f2d00c59b35364ed634f50fde0f2bd6 SHA-256: a9b99e45da46ddea3b9982331d88e4866739083fcbfa1ec7ae40b0a16749d19d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection also confirms its malicious nature. No scripts were extracted, and the document body content is largely obfuscated and irrelevant to the malicious activity.

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://chaselea.co.uk/uploads/1/3/0/2/130272493/3248149.pdf
    • http://peaceloveyogaindex.com/uploads/1/3/0/7/130739956/betak_suzonijev.pdf
    • http://rolandandcaroline.com/uploads/1/3/0/4/130483773/5304141.pdf
    • http://alpurpletaxi.com/uploads/1/3/0/5/130540525/tofum_gidadenev.pdf
    • http://pafar.krasota12.ru/uploads/2020/01/28/5440021.pdf
    • http://crystalclearings.com/uploads/1/3/0/3/130323145/4219373.pdf
    • http://mesadirectivasbqusa.com/uploads/1/3/0/7/130738696/130738696.html#math+worksheets+go+monomials+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010b5.bin
52616bcdc869e53cdaca465826de75c95d9fab7e295974c36b469fab75131fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5 8140 bytes

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