Malicious PDF — malware analysis report

Static analysis result for SHA-256 c931b7c0371b700e…

MALICIOUS

PDF

52.7 KB Authoring application: pdf-parser
MD5: 3759aa04efcc9d1b1c4f80e5539939d9 SHA-1: fae72ac63bc69a5c2789ddec7f62a378d1da2783 SHA-256: c931b7c0371b700e69b39d339e8cdbc2dcc159821313028287a152ac45decd6a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or traffic redirection purpose. The ML classifier also strongly flagged this as malicious. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://mogsaddiction.weebly.com/uploads/1/3/0/6/130621500/420abaa41578ca.pdf
    • http://naileddailycom.com/uploads/1/3/0/4/130476069/a25a94.pdf
    • http://zuk.antlermediagroup.com/uploads/2020/01/28/52184a474.pdf
    • http://wooferseu.com/uploads/1/3/0/4/130435685/molubusi-nagapifatok-nebazazu-gudup.pdf
    • http://iwamastyleatlanta.com/uploads/1/3/0/5/130551597/6925221.pdf
    • http://seasonedservices.com/uploads/1/3/0/4/130436127/pubimuxofav.pdf
    • http://fairytalesandwar.net/uploads/1/3/0/5/130543764/babaset.pdf
    • http://premedpursuit.com/uploads/1/3/0/6/130639808/a35b1e3a9.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/7/130775880/130775880.html#placenta+previa+%E0%B8%81%E0%B8%B1%E0%B8%9A+abruptio+placentae

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000140d.bin
744684f92522c89d51e91b0fa8e7531a193ec5b1372fc4af04f5f957a8ec32b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140D 8580 bytes
font_01_sfnt_off00006f6a.bin
e3ae92d52f238fa06811c56a351556a89479e85efb58fa261c20b85e32a7fa9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6A 21136 bytes

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