Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed58bb0dbd82f0be…

MALICIOUS

PDF

76.6 KB Authoring application: Pdftk
MD5: e768a02f166edbdf868d79952b4e9d58 SHA-1: b0649bd82266eb51016a270f53487a3969d031a4 SHA-256: ed58bb0dbd82f0be56cd934be6dc6eb6ee61eaf83fd6f312afd14c24872ca7eb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a mass external link farm. ClamAV also detected it as Pdf.Phishing.TtraffRobotInstall. The presence of numerous unknown-reputation URLs within the document strongly suggests a phishing or redirection campaign. No scripts were extracted, but the document structure and link farm are indicative of a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://michellegibbensdsdirect.com/uploads/1/3/0/5/130552034/e3e06747641e0.pdf
    • http://leadershipandstrength.com/uploads/1/3/0/6/130639965/rizuke-fubomewix.pdf
    • http://gaw.quickly-loans.info/uploads/2020/01/28/nimikojunezi.pdf
    • http://mscraft4th.weebly.com/uploads/1/3/0/2/130291724/boxipazokovezo.pdf
    • http://marionminotti.org/uploads/1/3/0/6/130604492/naxawekexed.pdf
    • http://carmenmariayantonio.com/uploads/1/3/0/5/130589427/4541366.pdf
    • http://skycampgreenwich.org/uploads/1/3/0/6/130640155/buzanugepilibe.pdf
    • http://thehnossaproject.com/uploads/1/3/0/5/130541552/130541552.html#ruptured+achilles+tendon+mri

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000122d.bin
d790a60ad7f63323a303833c2e6c10ddb0578f96d23ea5fccb4163d54212e90c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D 8648 bytes

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