Malicious PDF — malware analysis report

Static analysis result for SHA-256 85946c4d80e582df…

MALICIOUS

PDF

37.1 KB Authoring application: Mobipocket Creator
MD5: 5d0e78560846f29c557ec7d30d04ac1d SHA-1: 70efaaedfa27926da7d15bbddd0bed4fd5f8954e SHA-256: 85946c4d80e582dfdc2076176137351c1f5997a2d9d0e325124d73df53b19f77
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The ML classifier and ClamAV detection further confirm the malicious nature of the file, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. No scripts were extracted from this sample, but the extensive link farm indicates a likely attempt to manipulate search engine results or distribute malicious content.

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://operinco.com/uploads/1/3/0/4/130477249/4765f223.pdf
    • http://slowfoodkc.com/uploads/1/3/0/8/130874175/gezafola.pdf
    • http://mydollarmatters.org/uploads/1/3/0/7/130776122/5368027.pdf
    • http://cartergilmorecollection.com/uploads/1/3/0/6/130604368/91e69e2a9a.pdf
    • http://woodridgefarm.net/uploads/1/3/0/6/130620919/binugitodama-zepajixufope-zaweliko.pdf
    • http://michaudwellness.com/uploads/1/3/0/5/130589014/gomovodewuje-sexepo-riduba.pdf
    • http://hairrepublicsg.com/uploads/1/3/0/5/130588489/rawapelovoxomudop.pdf
    • http://fourmilecreekspelling.com/uploads/1/3/0/4/130483809/temugafal_jamigame_zoxupam.pdf
    • http://missinglinkbrewing.co.uk/uploads/1/3/0/8/130814237/6817351.pdf
    • http://nanba-ryu.com/uploads/1/3/0/7/130738831/8491029.pdf
    • http://mriservicesnj.com/uploads/1/3/0/4/130476086/b3faa0894ede.pdf
    • http://biohackyourdiet.org/uploads/1/3/0/2/130270923/8702660.pdf
    • http://www.lovewinxbyliv.com/uploads/1/3/0/4/130483806/mogagoferi.pdf
    • http://canadianholisticcenter.com/uploads/1/3/0/5/130588225/wutira.pdf
    • http://littlehouseguys.com/uploads/1/3/0/5/130546244/jivizagetite_wamameludom.pdf
    • http://airambulanceexperts.com/uploads/1/3/0/5/130544447/zuxisavigunigigovit.pdf
    • http://forcedame.com/uploads/1/3/0/2/130272295/japitodivupovaja.pdf
    • http://s5xpv.bpmtc.com/uploads/1/3/0/5/130551856/130551856.html#skiena%27s+algorithm+design+manual+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032a8.bin
60bb8616da2dfb89680ab331b8b00af17c1722870b8fa85abfe587de5bd8d51c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32A8 8504 bytes

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