Malicious PDF — malware analysis report

Static analysis result for SHA-256 feedb784d91434de…

MALICIOUS

PDF

36.7 KB Authoring application: Pdftk
MD5: f9c9134690339eb447abf27cb3a110b3 SHA-1: 4eb2d952069320d60ab94ba1bd980fab1873a88b SHA-256: feedb784d91434deb73fd06db2998b90cee456b81d3d38c409fa08e044a467ba
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO poisoning or to redirect users to malicious sites. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and a machine learning classifier also flagged it with high confidence. The embedded links are the primary indicators of malicious intent, suggesting a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://amyhahne.com/uploads/1/3/0/2/130273801/8756582.pdf
    • http://sssrugh.com/uploads/1/3/0/6/130605075/jinasusene.pdf
    • http://aspenleafproductions.com/uploads/1/3/0/8/130814308/sowag.pdf
    • http://listovino.com/uploads/1/3/0/6/130639408/955b1ab5e9.pdf
    • http://bellastar.net/uploads/1/3/0/6/130621732/jizibij.pdf
    • http://youarenotaloneart.com/uploads/1/3/0/6/130604466/4950796.pdf
    • http://goddesswisdom.net/uploads/1/3/0/5/130547689/9830992.pdf
    • http://beverlyhillsboba.com/uploads/1/3/0/7/130739746/tepejobonebav.pdf
    • http://xianjinbida.br3h.com/uploads/1/3/0/7/130776247/tisufuzuvosozi_wewuve_ronun.pdf
    • http://mymountains.fr/uploads/1/3/0/7/130739012/xaben-gewununo.pdf
    • http://duhocsingapore360.com/uploads/1/3/0/6/130639875/edfc16f2805ffd.pdf
    • http://www.capo-modding.com/uploads/1/3/0/8/130813586/130813586.html#jurnal+terapi+bronkopneumonia+pada+anak+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000037ad.bin
5b35c502df28e457b98e48313e5d90df26dd9f7509067a780ff75a0ca28b866e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37AD 8328 bytes

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