Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b18fc55bb73fc57…

MALICIOUS

PDF

35.4 KB Authoring application: pdf-parser
MD5: 5f8acb1d3ed8b35c8cde20ca91b0f410 SHA-1: b78217340161cc6cdb83516281e1ac10089ae716 SHA-256: 6b18fc55bb73fc573b9afc212535c141facbd68e00ffeb3b12f690f5eab0ce18
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links to other PDF files hosted on various domains, indicative of a link farm or SEO abuse. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', suggesting a phishing or malware distribution intent. While no scripts were explicitly extracted, the structure and URL patterns strongly suggest a malicious campaign designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://landscapingsilverspring.com/uploads/1/3/0/5/130551184/8046703b.pdf
    • http://guide2pifs.com/uploads/1/3/0/6/130620731/6049216.pdf
    • http://alexpinkcook.com/uploads/1/3/0/7/130776070/borerob_tamitiriluka_semepur.pdf
    • http://naturebringsmepancackes.com/uploads/1/3/0/2/130287882/6297811.pdf
    • http://youtubevideoindir.club/uploads/1/3/0/3/130313524/1270b8891556.pdf
    • http://5kwalkforeducation.org/uploads/1/3/0/6/130620228/6416229.pdf
    • http://blushaestheticsnc.com/uploads/1/3/0/7/130739261/kevituxepolonez.pdf
    • http://saferpractice.org/uploads/1/3/0/3/130379167/f30f89d1.pdf
    • http://andersonbookkeepingservices.com/uploads/1/3/0/7/130739629/fisiget.pdf
    • http://thedeepgame.com/uploads/1/3/0/6/130604690/cbadb09.pdf
    • http://only12.com/uploads/1/3/0/6/130621406/jugedatafu.pdf
    • http://marketdragon.net/uploads/1/3/0/6/130620678/juwagowezovepasorur.pdf
    • http://hinterlandtreeservicesbyronbay.com/uploads/1/3/0/7/130775260/130775260.html#multiplication+and+division+of+decimals+worksheets+grade+6
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000026bf.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26BF 2652 bytes
font_01_sfnt_off00003283.bin
40cbfb36b5615b68975272a377329917833994be2ed554f4ce42f75a33c12ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3283 7776 bytes

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