Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca54b53299aee4c4…

MALICIOUS

PDF

71.1 KB Authoring application: Pdftk
MD5: 3c2581624d55ac22f6ed77b09f6613ff SHA-1: cde83f69432f6c8530e5f14eb14084b4913740f8 SHA-256: ca54b53299aee4c48182010490f8164ce496ca4195273be1d6ed20d365eb640a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, all seemingly designed to host more PDF files. This suggests a campaign focused on SEO manipulation or directing users to potentially malicious content. The ClamAV detection further supports its malicious nature.

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://deblokletter.be/uploads/1/3/0/5/130540246/jigomexoliwuxan.pdf
    • http://woodridgemusicclub.com/uploads/1/3/0/2/130272649/2246006.pdf
    • http://reneegdesigns.com/uploads/1/3/0/5/130589276/7642847.pdf
    • http://dreamasweetdream.com/uploads/1/3/0/6/130621691/zidododasijis.pdf
    • http://ndishealthtoolkit.com/uploads/1/3/0/3/130313241/5427389.pdf
    • http://sendsomehappymail.com/uploads/1/3/0/2/130288567/balomilofijeva.pdf
    • http://commercialequipmentparts.com/uploads/1/3/0/3/130379625/jufejudikutuwugum.pdf
    • http://michaelshusko.com/uploads/1/3/0/2/130289778/130289778.html#apache+camel+file+component+not+working

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001201.bin
07291842db8fa9823fef91bdbfe69cf3d52f9fc6697b37e994d89e89aee864da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201 8356 bytes

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