Malicious PDF — malware analysis report

Static analysis result for SHA-256 9236a219c78dddd4…

MALICIOUS

PDF

37.2 KB Authoring application: Adobe PDF Library 9.0
MD5: 1e63b7c761c9d114e054140ad43f299c SHA-1: ee7d39108e0885d522bfce6df1aa3426f09be5c0 SHA-256: 9236a219c78dddd4153ab6aa2bc30f2761920d5e768f33a772e33829c30d3798
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The document body's content is heavily obfuscated and appears to be corrupted, providing no clear user-facing lure.

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://kylewidner.com/uploads/1/3/0/6/130621524/a2c8f.pdf
    • http://manhadunyulechengaomenduchang.f18.ebkf.org/uploads/1/3/0/8/130813740/valemitujajak.pdf
    • http://bayviewblast.com/uploads/1/3/0/7/130739653/4896303.pdf
    • http://srichinmoy.us/uploads/1/3/0/2/130274316/pepokowo-keduz-befikod.pdf
    • http://prasktech.com/uploads/1/3/0/6/130621033/livofofevimexa.pdf
    • http://anappleatdawn.com/uploads/1/3/0/2/130289198/bepiwipofuvuz.pdf
    • http://www.justinbradymusic.com/uploads/1/3/0/8/130874477/wetinanizuzod.pdf
    • http://remade.info/uploads/1/3/0/4/130483207/sewigu.pdf
    • http://logansparks.net/uploads/1/3/0/6/130604187/1648928.pdf
    • http://www.vocalsfromtheheart.com/uploads/1/3/0/6/130621641/7ec95c88cb17.pdf
    • http://ericdietrich.com/uploads/1/3/0/8/130814859/zelevad.pdf
    • http://tripvector.org/uploads/1/3/0/4/130483566/wulikunewutiro.pdf
    • http://www.jenniferbakalararteducator.com/uploads/1/3/0/3/130379123/ac9b3.pdf
    • http://medicalpracticesolutions.net/uploads/1/3/0/2/130270867/9670841.pdf
    • http://huangguanguojiyulehuisuo.br3h.com/uploads/1/3/0/6/130605355/130605355.html#duties+of+operations+manager+pdf
    • http://www.vocalsfro

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ba1.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA1 2596 bytes
font_01_sfnt_off00003704.bin
acf3a728c0209838a089f42b6488ee116cc4a0d653ecec1b9ff5e8441f394b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3704 8012 bytes

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