Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbad1fbde38d630…

MALICIOUS

PDF

36.0 KB Authoring application: ImageMagick
MD5: 55986137d44b20fd91c2e46fd8b420f8 SHA-1: 70b36128469f094ccb64bcbb02ab4d16af2aa1ff SHA-256: 6bbad1fbde38d63075cffb3f628f954c8a1ec7065b0b184b8f3ba7a240147a17
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and an ML classifier also flagged it as malicious. The embedded URLs are the primary IOCs, suggesting a campaign 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://centralflbizreview.com/uploads/1/3/0/7/130776065/vudogut_desobuz.pdf
    • http://hostmaster.andbabymakesthree.co.uk/uploads/1/3/0/5/130546040/061b9c2a3c653.pdf
    • http://www.gwdesigns.us/uploads/1/3/0/5/130550955/gixim.pdf
    • http://mrstinabullteacher.com/uploads/1/3/0/5/130551303/1198227.pdf
    • http://marfalites.com/uploads/1/3/0/6/130620283/5384975.pdf
    • http://www.premiumpropertiesremodeling-rentals.com/uploads/1/3/0/2/130271028/mivemudes_sagopijopo_xibigumiz_pokolebave.pdf
    • http://primaris.net/uploads/1/3/0/5/130551728/rajojilozedupip-rinuwegimu-vuwunewosekapi-terorobejugi.pdf
    • http://wojeshun.com/uploads/1/3/0/5/130588830/fc79d70906f.pdf
    • http://bsp500.org/uploads/1/3/0/4/130435888/bc5ea.pdf
    • http://pvcdesignz.com/uploads/1/3/0/7/130776508/c36782829c5.pdf
    • http://cab42.com/uploads/1/3/0/6/130603828/e3aa0abb782e.pdf
    • http://www.basecampstudio.info/uploads/1/3/0/7/130738696/8617437.pdf
    • http://mowmylawnonline.com/uploads/1/3/0/5/130545800/3423848.pdf
    • http://nannymoscow.ru/uploads/1/3/0/2/130289335/fidatafebizipuxifewe.pdf
    • http://allthingsballet.com/uploads/1/3/0/6/130639635/3919790.pdf
    • http://decaugh.ca/uploads/1/3/0/3/130313536/6653061.pdf
    • http://mmltshirts.com/uploads/1/3/0/6/130639162/wakofolugup_javige.pdf
    • http://www.flairforfair.co.uk/uploads/1/3/0/5/130590482/b31fe.pdf
    • http://host167.carmichaelnl.com/uploads/1/3/0/5/130546803/130546803.html#havells+geyser+25+ltr+price
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001ab1.bin
32b54217619f9438721b423dc2f4f4da0f78781b0811ea49af2be6b0310ecf56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB1 16164 bytes
font_01_sfnt_off000031db.bin
3361133b628191811fe5fbd80a6ba635fcc6d425cfb5ebff134df3944e1d86a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 6788 bytes

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