Malicious PDF — malware analysis report

Static analysis result for SHA-256 528918467aaac32a…

MALICIOUS

PDF

29.9 KB Authoring application: Poppler-utils
MD5: b57195625fe68122dad9334e875ca28e SHA-1: ec76e992f60a20bd06446f5fadf53a3c07893eb6 SHA-256: 528918467aaac32a86b5075c4524a756beed32178b62dc95482b67c7acbe790c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique commonly used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a phishing or traffic redirection scheme. The ML classifier also flagged this PDF with high confidence.

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://pathslink.com/uploads/1/3/0/7/130775904/7407c10b.pdf
    • http://personaloutfits.com/uploads/1/3/0/4/130476917/6ac7b207.pdf
    • http://mrsrehm.com/uploads/1/3/0/4/130483520/7070025.pdf
    • http://myrvtec.com/uploads/1/3/0/7/130776032/xelujakavomuxijaxit.pdf
    • http://seedtoatree.com/uploads/1/3/0/6/130604633/sirabofisuretanerip.pdf
    • http://mail.cfameyes.com/uploads/1/3/0/2/130273740/sonexaritelolet.pdf
    • http://inkofficial.com/uploads/1/3/0/7/130775242/9481636.pdf
    • http://phillipphanproperty.com/uploads/1/3/0/7/130739575/mubukibal.pdf
    • http://200jobs.com/uploads/1/3/0/6/130605482/8450351.pdf
    • http://www.timeoutsidebar.com/uploads/1/3/0/4/130436525/d03f0ea2734c3ba.pdf
    • http://www.thenannysden.com/uploads/1/3/0/6/130639790/130639790.html#arduino+mega+2560+operating+temperature

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001f50.bin
630ee302ab3cc172cbe61155d60d962ce7664514c382f1bc3f5c1ac8a54536a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F50 7668 bytes

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