Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d91d154eee2e02f…

MALICIOUS

PDF

36.7 KB Authoring application: SWFTools
MD5: 9137c265e76e631ba010d9e1a1e28e5f SHA-1: 366cc826b46d9a0e2337324dfd382e55c05a14cc SHA-256: 5d91d154eee2e02f41a390f62ad8a64627fff3d0943ab3aef4d39f2d8dc235d6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files across various domains, a technique often used for SEO spam or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or content distribution attack.

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://artfulbeingfineart.com/uploads/1/3/0/6/130639729/5052211.pdf
    • http://matsigura.net/uploads/1/3/0/7/130776307/96df48a0.pdf
    • http://thelohbros.com/uploads/1/3/0/2/130289663/woraxafiwokezo.pdf
    • http://yourridehomeohio.com/uploads/1/3/0/4/130483978/gubeb_lobaresidawag.pdf
    • http://55-podarok.site/uploads/1/3/0/3/130379292/6559290.pdf
    • http://tacwest.ca/uploads/1/3/0/3/130313414/tivadulivakosul_vivaz.pdf
    • http://beagleboxer.com/uploads/1/3/0/5/130551279/mopunibawa-vodawo-numizu.pdf
    • http://allamericandogexpo.com/uploads/1/3/0/2/130289543/130289543.html#saffron+growers+in+kashmir

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001131.bin
0ee71ff241a1f0044f80439d58b7e9d1c8aeb2b5bd9a6432d2bf58202c007fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131 7992 bytes

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