Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7c762ec3524c3e…

MALICIOUS

PDF

36.3 KB Authoring application: PDF Studio
MD5: a81289b1ad9c6dd164d3010034592aec SHA-1: 65c8855d0bd5d514fc29a4dd555181b816eb426a SHA-256: dd7c762ec3524c3eaa30533ac74a0c83d2f3173580b29a5caf6a931f134d9f3d
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with numerous URLs pointing to other PDF files. The document body suggests a lure for a "colour blindness test pdf download", which is a common social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://worldlive22.com/uploads/1/3/0/8/130874530/b9785aa6f3a88.pdf
    • http://www.hakalaurollingtrays.com/uploads/1/3/0/5/130546434/nifuki_nekufa_tilifubofojatiz.pdf
    • http://societasstudiorumamdg.com/uploads/1/3/0/6/130639895/vetejat.pdf
    • http://threadlinebranding.com/uploads/1/3/0/7/130739185/sabowumepir-sotosujobale-masemi.pdf
    • http://thecottonshops.com/uploads/1/3/0/5/130548070/ketulivuf.pdf
    • http://www.pastwares.com/uploads/1/3/0/4/130483978/66ac4235ca3b4.pdf
    • http://cjcireli.com/uploads/1/3/0/3/130323298/4b535f8.pdf
    • http://eggspace.co.uk/uploads/1/3/0/7/130739970/kejijomavuv.pdf
    • http://nelsonbaypreschool.com/uploads/1/3/0/4/130476412/zolimilokiweroka.pdf
    • http://oggirreesoccer.com/uploads/1/3/0/2/130288630/tiwolage.pdf
    • http://torreyelectricservices.net/uploads/1/3/0/6/130640183/130640183.html#colour+blindness+test+pdf+download

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ae.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE 16204 bytes
font_01_sfnt_off00002d27.bin
17fa3c9a1c0e0455afe1ebf8e21ddc52609fae1ba3593f02b1fe110b13a40911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D27 6948 bytes

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