Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb0f16599a2d6dd…

MALICIOUS

PDF

34.1 KB Authoring application: Scribus
MD5: d1a3a6302b26b3db235abfb9bdc38e28 SHA-1: 260ea09d2241b9873c2994515cf8c679e9ac54f5 SHA-256: 5fb0f16599a2d6ddeabe42dc084c30862d0103df866557a5acc252fd4f89ced5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious. The document body is heavily obfuscated and contains no clear textual lure, but the overall structure and heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.intentionaldesign.site/uploads/1/3/0/5/130546153/8036092.pdf
    • http://studio1999.shop/uploads/1/3/0/7/130775150/6763772ed2.pdf
    • http://pressburg-partners.com/uploads/1/3/0/7/130740504/3174a79.pdf
    • http://goodgoal.net/uploads/1/3/0/7/130775339/4404926.pdf
    • http://lifeinprinceton.com/uploads/1/3/0/7/130775531/puzemavupi.pdf
    • http://palazzo-estates.com/uploads/1/3/0/7/130739528/3155947.pdf
    • http://mrsreid3rdgrade.com/uploads/1/3/0/6/130620159/goburemo.pdf
    • http://harborsideportland.com/uploads/1/3/0/6/130639263/soxaxijor_mukixojodemafa_puxazalin.pdf
    • http://glocalive.com/uploads/1/3/0/6/130620755/gunixoluzavevedewid.pdf
    • http://fuseco.info/uploads/1/3/0/3/130323424/164903.pdf
    • http://www.misssalaises.com/uploads/1/3/0/7/130738831/8113949.pdf
    • http://stylerant.com/uploads/1/3/0/4/130483810/6bbec.pdf
    • http://evokefitness.net/uploads/1/3/0/7/130776252/130776252.html#download+unity+2d+assets+free
    • 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_off00002226.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2226 2668 bytes
font_01_sfnt_off00002dea.bin
26c7971e9bc6d3b96cb480a00ee246d4d890969f5ff3a4ba64b2a3902111a6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEA 7560 bytes

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