Malicious PDF — malware analysis report

Static analysis result for SHA-256 501f9e94ca239e07…

MALICIOUS

PDF

56.8 KB Authoring application: QPDF
MD5: a5488aa81c21167203b6838d15d7d020 SHA-1: 44f1d41c216d251e677a79b313afaa22796554a5 SHA-256: 501f9e94ca239e074f76ee7f7e48859678fdde1bfc4f4410a199f8ebc1189eb4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and an ML classifier also flagged it as malicious. The document body contains fragmented text and URLs, reinforcing the link farm attack pattern.

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 https://lizofejuxofej.weebly.com/uploads/1/3/0/4/130488227/6a3b44d2fe851.pdf
    • http://bungalows-semidees.com/uploads/1/3/0/6/130639626/a191687f46.pdf
    • http://mfgm.de/uploads/1/3/0/5/130539034/6294632.pdf
    • http://filmroar.com/uploads/1/3/0/5/130541443/5007705.pdf
    • http://cotesdesmers.com/uploads/1/3/0/5/130590779/wibuwo.pdf
    • http://positivecp3.net/uploads/1/3/0/6/130604879/kivek.pdf
    • http://sacazeandpartners.com/uploads/1/3/0/4/130436173/vokokebu.pdf
    • http://312thlegion.com/uploads/1/3/0/5/130538941/nuwur_julixojafaw_tosamado_netomaf.pdf
    • http://hospitalequipment4u.com/uploads/1/3/0/6/130604026/d0a565a14e5d.pdf
    • http://bodysoulcomplementarytherapies.com/uploads/1/3/0/6/130639914/2b5597fc73fc23a.pdf
    • http://mymissblue.com/uploads/1/3/0/4/130488934/130488934.html#bhoot+story+3gp

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000124f.bin
64626f24d7bd3057c1e070bdea7dd2c23be5f4a2c3564312a9d1833bda355adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124F 8268 bytes
font_01_sfnt_off0000931e.bin
25f9909a3545af4331256caf87dcc9627b9ff42074a0d6d6ac0b926799cb620c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931E 9952 bytes

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