Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe184da9407b2665…

MALICIOUS

PDF

31.8 KB Authoring application: Mobipocket Creator
MD5: 77153adced54762c538df508baf66b4f SHA-1: daba48cc18c6a79a4128470782e1afe43578add8 SHA-256: fe184da9407b26655c55e4e1c990fa40cff38b3ce40cf82f78191e6379cc28cf
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. These links likely serve as a lure to download further malicious content, as indicated by the ClamAV detection of Pdf.Phishing.TtraffRobotInstall. The document body, though partially corrupted, mentions 'Cell cycle worksheet and diagram identification', suggesting a deceptive educational pretext. No scripts were extracted, but the primary attack vector appears to be the mass distribution of links to malicious PDFs.

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://soselectrical.co.nz/uploads/1/3/0/6/130620996/tofupozoful.pdf
    • http://northumberlandday.net/uploads/1/3/0/5/130588747/24557cf36b70ff.pdf
    • http://saturdayafternoonteaparty.com/uploads/1/3/0/2/130288492/temuxorani.pdf
    • http://bitbreakers.com/uploads/1/3/0/2/130270863/87ea7cfb2.pdf
    • http://kikcrafts.com/uploads/1/3/0/6/130604780/130604780.html#cell+cycle+worksheet+and+diagram+identification

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001002.bin
a38993d1bffebcf214b8336887d116ca61dc37a4524f159ee09c0329a2e11279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002 7720 bytes

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