Malicious PDF — malware analysis report

Static analysis result for SHA-256 427c4c8163244ebd…

MALICIOUS

PDF

30.2 KB Authoring application: Smallpdf Desktop
MD5: 6364fb19d88ffc678b9a829e19babe9d SHA-1: fe4651dcffbd95d5e973710720a0e1fab707d1ad SHA-256: 427c4c8163244ebd69dae5fe2b81e34b84bf8146937e46935c23e54f21492c94
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV with the signature Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of external PDF links, indicating a link farm designed to direct users to potentially malicious content. The embedded URLs are the primary indicators of compromise, suggesting a phishing or malware distribution campaign.

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://clogging101.com/uploads/1/3/0/6/130621709/zakoxudovimajinegowa.pdf
    • http://nandrews.net/uploads/1/3/0/2/130274151/a4466089d.pdf
    • http://sherpublishing.com/uploads/1/3/0/6/130604972/gawoponomajam.pdf
    • http://vickiaskew.com/uploads/1/3/0/3/130313582/7952355.pdf
    • http://coffeenashville.com/uploads/1/3/0/5/130551086/4028190.pdf
    • http://clearcopmany.com/uploads/1/3/0/5/130588956/rimidijodirowe.pdf
    • http://path.wolc.com/uploads/1/3/0/6/130620356/9243036.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/6/130621355/130621355.html#use+of+atomic+absorption+spectroscopy

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001090.bin
0cda04f8168fc60e7e246abd7fc108925fbbc0fd5e987ce3cc39320f9bc08440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090 6956 bytes

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