Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c5dc8a7fb70886…

MALICIOUS

PDF

53.1 KB Authoring application: Mobipocket Creator
MD5: e86d8b10b427827f7b3ff4f76a959c21 SHA-1: 0bf19f3cf3cc8dd4a2014ae158291c73b01bfdf2 SHA-256: 15c5dc8a7fb708863cb4a5e7bab332c8703aec9437c71d8b41763ba4115d3dcb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure about staph infections in dogs, but its primary function appears to be a link farm, with numerous embedded URLs pointing to other PDF files. This technique is often used for SEO manipulation or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ohanaguidance.com/uploads/1/3/0/7/130740477/parikegetominotuni.pdf
    • http://trueindigothemovie.com/uploads/1/3/0/6/130621413/javatosuvolen.pdf
    • http://travel-merit.com/uploads/1/3/0/4/130476104/8284956.pdf
    • http://www.alexoutdoored.com/uploads/1/3/0/6/130639661/43555.pdf
    • http://bingscatering.net/uploads/1/3/0/4/130488810/kopesulakus-linisiw-susugabibet.pdf
    • http://rivalrygraphics.com/uploads/1/3/0/5/130588724/baziv.pdf
    • http://darkmediaguy.com/uploads/1/3/0/4/130436139/8855689.pdf
    • http://poehaku.com/uploads/1/3/0/4/130488181/dageselitip-sosaxom-seruzi-lowote.pdf
    • http://administrator.consciousrobots.com/uploads/1/3/0/3/130379589/namenalut.pdf
    • http://www.kellyskorneronline.org/uploads/1/3/0/5/130550981/zowajepavimo.pdf
    • http://webmail.gammaxiques.org/uploads/1/3/0/4/130488486/130488486.html#staph+infection+symptoms+on+dogs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca3.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA3 2600 bytes
font_01_sfnt_off00007869.bin
0e1d74a0446db0c48bb5e032d0e3866ba2431ee4515ff888d6cdec1653225f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7869 8728 bytes

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