Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8db5fa6c4914f0…

MALICIOUS

PDF

38.3 KB Authoring application: Pdftk
MD5: cb1971c24a334c94a20d65a8e622c231 SHA-1: 2015dd7ecf58fc128e1770d19f89210b737e1a24 SHA-256: ba8db5fa6c4914f0d10cce35dc82ff95e192b3ec6756cfa2b9528a79008c97b2
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and a machine learning classifier also flagged it with high confidence. The embedded links are the primary IOCs.

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://www.benjaminaiga.com/uploads/1/3/0/8/130813592/jexipite.pdf
    • http://www.wilsonceramicsknives.com/uploads/1/3/0/8/130874021/zonese.pdf
    • http://culturalinnovationgroup.org/uploads/1/3/0/2/130287278/sekosagibitep.pdf
    • http://daveashman.com/uploads/1/3/0/3/130379069/kugomutawujak-daxozi-fubixulodubez-metori.pdf
    • http://pigoal.com/uploads/1/3/0/6/130605194/pitadetalarud-mugemakulive-wuxar.pdf
    • http://camscamera.com/uploads/1/3/0/8/130813134/xosejejupada_bimot_bolilidogenozu_lurapejod.pdf
    • http://adamjroe.com/uploads/1/3/0/8/130813991/766843.pdf
    • http://nycelitehealth.com/uploads/1/3/0/4/130476440/ruxebopu_mubaladowod_numuruvulonex.pdf
    • http://obxaerialads.com/uploads/1/3/0/5/130544746/a5cb2e23a8ae.pdf
    • http://www.rossioriginalsphotography.com/uploads/1/3/0/4/130483256/7052252.pdf
    • http://apkzebra.com/uploads/1/3/0/2/130288380/7d153decf.pdf
    • http://6000hudson.com/uploads/1/3/0/2/130291036/lijulovepa.pdf
    • http://aprginc.com/uploads/1/3/0/2/130273788/3833855.pdf
    • http://cardizard.com/uploads/1/3/0/4/130483564/9995784.pdf
    • http://secure.service-netflix.com/uploads/1/3/0/6/130604392/645237f54fd2d.pdf
    • http://anderson-missions.com/uploads/1/3/0/8/130813548/2822630.pdf
    • http://www.starrtbusinessth.com/uploads/1/3/0/6/130621481/losakovevugiralin.pdf
    • http://snowdonia-estateforsale.com/uploads/1/3/0/6/130639747/9b58396818b7.pdf
    • http://www.technicallyspeakingaac.com/uploads/1/3/0/6/130604358/130604358.html#perianal+abscess+with+fistula+icd+10
    • http://aprginc.com/uploads/1/3/0/2/13027

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003745.bin
98047659647f301acecc4c6cfd38b4d0ee5a72dbc34f1c3745bccaef22bcf820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3745 8208 bytes

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