Malicious PDF — malware analysis report

Static analysis result for SHA-256 b450949c36674a48…

MALICIOUS

PDF

37.9 KB Authoring application: PDFedit
MD5: 1587d993b3f999f2a9bc5458a0d924e0 SHA-1: b517b97b228b0002e9531d591d026b20ca814f16 SHA-256: b450949c36674a487a2ee9261fc1e3da68f6a768fd2fbec0a135f864cbe7760f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external PDF links. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs suggest a phishing or traffic-driving campaign, aiming to redirect users to potentially harmful content.

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://nicollaslittleshop.com/uploads/1/3/0/4/130435805/9321070.pdf
    • http://my-pristinedental.com/uploads/1/3/0/4/130476581/wonaxuvu.pdf
    • http://contact.dng.ie/uploads/1/3/0/6/130605416/0c0113421.pdf
    • http://artbookblog.org/uploads/1/3/0/5/130551390/fifotinilamo-jegutepidetowi.pdf
    • http://canodyn.com/uploads/1/3/0/6/130621325/3339312.pdf
    • http://nelsononline.net/uploads/1/3/0/6/130620730/loludarukidoxewo.pdf
    • http://bummir-opt.ru/uploads/2020/01/28/buloxij.pdf
    • http://beachsack.net/uploads/1/3/0/6/130603890/jiliram_xejerekakufo_zevovok_tejaw.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/8/130814601/130814601.html#monocot+and+dicot+stems+vascular+tissue

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c7.bin
445f0aaef2e2116de3f94a5216dca35656fce15d372c4972336f141634702d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7 8600 bytes

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