Malicious PDF — malware analysis report

Static analysis result for SHA-256 8204c4dfe4962592…

MALICIOUS

PDF

40.6 KB Authoring application: Soda PDF
MD5: a571221ed58f77dc94d6e1e7f4d63ded SHA-1: c7c20fbd80e21b722e4fcbf01e9100bffb354fc6 SHA-256: 8204c4dfe4962592c28c9fa320e292afa3bbd3a79c4a4659ed9a05a24eba5118
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further support a malicious classification, likely related to phishing or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://shieldbearer.us/uploads/1/3/0/4/130490561/2737201.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/7/130775868/cdf86a2b68e.pdf
    • http://cruisesceptic.com/uploads/1/3/0/6/130620602/6373600.pdf
    • http://www.cobs71.com/uploads/1/3/0/6/130603928/wogemuxalazezarubu.pdf
    • http://modelsenden.com/uploads/1/3/0/5/130541552/topilidarevigifut.pdf
    • http://wiredweird.net/uploads/1/3/0/6/130639554/fe44ad5.pdf
    • http://dadevilleband.com/uploads/1/3/0/6/130620747/wiragomomonez_punozi_tisigereradafel_jekubiguvodova.pdf
    • http://solit.studio/uploads/1/3/0/5/130545421/taximepulatebo-zifave-minuwi.pdf
    • http://www.andreaschwartzitcc.com/uploads/1/3/0/3/130323425/jugijewikul_pidapezojenar.pdf
    • http://hiphopexperiment.com/uploads/1/3/0/6/130620708/vezuzitu.pdf
    • http://ninja411.com/uploads/1/3/0/5/130589108/f1e65d.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/5/130588291/130588291.html#how+to+insert+text+function+in+excel
    • http://hiphopexperiment.com/uploa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003435.bin
d5ed1c3e32e121bc7fdf4b7f64e9f52042883cdc8d0b4eb1f0c73bff7e2be32e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3435 4236 bytes
font_01_sfnt_off0000448c.bin
a972a418c82e36ca10c0b71c0cccdbc538db6d9b2089046a79b17d042e6fbec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x448C 8936 bytes

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