Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23fbbb99a687b16…

MALICIOUS

PDF

42.7 KB Authoring application: Solid Converter PDF
MD5: 11de6fd5fadf6314b208706e1c0b1370 SHA-1: 34bfcea09e6b93b74df35e4fb4e1b0c88546c6f8 SHA-256: c23fbbb99a687b16011f0bdbb8c35ceec11350c6b2ef8c1abebe419313718d77
150 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, suggesting a link farm or redirection tactic. ClamAV also detected this as Pdf.Phishing.TtraffRobotInstall, indicating a phishing or traffic-generating intent. The embedded URLs are likely used to distribute further malicious content or to manipulate search engine rankings.

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://erinschnair.com/uploads/1/3/0/4/130477126/4479647.pdf
    • http://colddiamnd.com/uploads/1/3/0/2/130288709/parekirafuwe.pdf
    • http://wthsnz.com/uploads/1/3/0/6/130620549/benadidi.pdf
    • http://nrsvirtualservicesdev.com/uploads/1/3/0/3/130379173/d1df7d8c039b.pdf
    • http://jonathanecollins.com/uploads/1/3/0/4/130483767/4196653.pdf
    • http://asiahumanitarianaid.org/uploads/1/3/0/4/130483307/b7e14a55.pdf
    • http://milesoftinysmiles.com/uploads/1/3/0/6/130620450/fosotiraduvuja-ropavo-lebigatinakasum-xajegeloxi.pdf
    • http://performskatewear.net/uploads/1/3/0/4/130483550/vinosiro.pdf
    • http://earthquakesafety101.com/uploads/1/3/0/2/130289800/difikidanefadusiwagi.pdf
    • http://miracleinabucket.com/uploads/1/3/0/3/130379412/130379412.html#cbse+board+class+10+date+sheet+2019+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000140c.bin
860d611222faa4bdf7234b6c1c3a3bb1a42974def4e6428015a629e9698563a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140C 8540 bytes

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