Malicious PDF — malware analysis report

Static analysis result for SHA-256 176ec47340a29e4a…

MALICIOUS

PDF

42.8 KB Authoring application: PDF Studio
MD5: f722fda80c782c8dad2129bc9f78ba5b SHA-1: 3e8c0096357662c9972ccb6ace094d3ffab5f70a SHA-256: 176ec47340a29e4a5c37f1f5099be4a611a93e414b47a893e72aee9d65edbcac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body, while containing some technical text, also includes many of the external URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ibandmanagerpro.com/uploads/1/3/0/4/130435688/tikisaduvefotetem.pdf
    • http://anonymousmanifesto.com/uploads/1/3/0/4/130477287/a9c01.pdf
    • http://wellosophy.com/uploads/1/3/0/6/130605505/papidowide_fixotuxex_pekalire_duxovugisif.pdf
    • http://lenke-nauck.com/uploads/1/3/0/2/130270752/360689.pdf
    • http://albertapreventative.com/uploads/1/3/0/6/130604771/86534e33.pdf
    • https://jusumarutevor.weebly.com/uploads/1/3/0/4/130476112/658c79c8e6664.pdf
    • http://wisconsinlimousin.org/uploads/1/3/0/5/130588973/52c2ba1b589.pdf
    • http://fandomaf.com/uploads/1/3/0/6/130605521/5916009.pdf
    • http://dedotodep.valekor.ru/uploads/2020/01/29/8656831.pdf
    • http://woodlandstuition.com/uploads/1/3/0/5/130545333/130545333.html#oxy+acetylene+gas+welding+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001218.bin
be28843aca6dde05d688145826e63ce50ff67d955a272ccd1c2bb388ece6cec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1218 8120 bytes
font_01_sfnt_off00006c4e.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4E 2652 bytes

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