Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f6c11d065ee4b5…

MALICIOUS

PDF

39.2 KB Authoring application: QPDF
MD5: ea7d330726bc26e53a46745e9caaf921 SHA-1: 0b1bb6611f2c14ce798925230b427a2fb273d1b4 SHA-256: 16f6c11d065ee4b5d64c08d291c5cfa8a4811ba4c8bbbb5569ca3641ff416fc2
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or content distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tranresources.org/uploads/1/3/0/3/130379527/776795.pdf
    • http://kotbabos.site/uploads/1/3/0/7/130740590/lepixen.pdf
    • http://digitalfreebies.net/uploads/1/3/0/2/130289498/bibedupefo.pdf
    • http://nakomaplumas.com/uploads/1/3/0/6/130621758/genim-nesubu-sakomefuperexu.pdf
    • http://nqxr.com.au/uploads/1/3/0/4/130478831/7509272.pdf
    • http://minecraftray.site/uploads/1/3/0/6/130604815/sugiruwafupukepu.pdf
    • http://pyrowinery.com/uploads/1/3/0/7/130775511/3207839.pdf
    • http://nowhitmoreorless.com/uploads/1/3/0/6/130621225/6105286.pdf
    • http://conquermarketing.org/uploads/1/3/0/7/130775271/kegizi-zazere.pdf
    • http://mountain-ammo.com/uploads/1/3/0/7/130775519/famozejofetipe.pdf
    • http://mirasbigday.com/uploads/1/3/0/7/130740251/tavitibujad.pdf
    • http://solutioncities.com/uploads/1/3/0/4/130483847/5478093.pdf
    • http://associationofblackmothers.org/uploads/1/3/0/2/130273845/lesazodex.pdf
    • http://newstylemarket.com/uploads/1/3/0/7/130739180/130739180.html#adobe+acrobat+standard+2017+desktop+only

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d96.bin
a67fe230334fcb946fb0450a5ede9d1696070afb686b5170c0abbd7970e34929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D96 8984 bytes

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