Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9f7327aea28d91…

MALICIOUS

PDF

37.2 KB Authoring application: Smallpdf Desktop
MD5: 984e5e5221a1d21f2248f85585fe3bf1 SHA-1: f6aa092a7ea9a3297711bfaf964a1c6be22fe872 SHA-256: dd9f7327aea28d91c85cb405d164b7ed1d90975d9e377b8cf970f8a28f2af123
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links to other PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The primary goal appears to be directing users to these external resources, which could host further malicious content or phishing attempts. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://nunixet.oprosi1.icu/uploads/2020/01/28/jowedek-pajorobugupoma-wamiburoterabo.pdf
    • http://muzayyido.com/uploads/1/3/0/5/130543588/varudibun-lozerapewazenew-kawemitawetex-wisetitisat.pdf
    • http://dossys.com/uploads/1/3/0/6/130603771/9334586.pdf
    • http://themathbutler.com/uploads/1/3/0/6/130604430/412365.pdf
    • http://mrsgant.org/uploads/1/3/0/5/130544751/580765.pdf
    • http://obsessivelyorganized.com/uploads/1/3/0/6/130639413/06fdee.pdf
    • http://aromascrips.com/uploads/1/3/0/5/130589228/78e5edba87ad2.pdf
    • http://nationalpostcards.ie/uploads/1/3/0/5/130588463/4888689.pdf
    • http://brandon3d.com/uploads/1/3/0/5/130590339/tutizal_jilanevoxupav.pdf
    • http://renegadegreens.com/uploads/1/3/0/5/130540645/4ad25a52b15e3.pdf
    • http://mycrystallounge.com/uploads/1/3/0/6/130605270/sepoxazukel.pdf
    • http://mindforyou.org/uploads/1/3/0/6/130605212/130605212.html#reading+practice+ielts+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001276.bin
700fdc37dc180417650367573c35d3dea1464351c758d01f61b9923e02c8bfaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1276 7648 bytes

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