Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5e4f16d0a59d31…

MALICIOUS

PDF

36.3 KB Created: 2020-08-05 08:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75d3965e565afc837b31d620b12cf1b1 SHA-1: c88ec033419548184e1f1e14703c104071ec8288 SHA-256: 6d5e4f16d0a59d310ee6ae4da04c342a2d34b2a02ee7ff434dd5da8b087c10e9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains text suggesting a 'cable catalogue' lure, and the presence of many external PDF links indicates a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ttraff.com/pify?keyword=bahra+cable+catalogue+pdf
    • http://files.thejazzyjewelzstudio.com/uploads/1/3/2/6/132680901/667bc.pdf
    • http://files.mariasummerscakedesign.com/uploads/1/3/1/1/131163736/9448eff.pdf
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdf
    • http://files.debbieklein.org/uploads/1/3/1/6/131636990/9766933.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/suxajevazomokif.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/anemia_falciforme_artigo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/korunago.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/50995811152.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/75885632985.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/5825702670.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/farirowajunolakineda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/circle_of_5ths_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7271/files/85021260065.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/47779498521.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/rakixovexagopab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e26.bin
4c2af9088e52baec52aa60de64c91381d9f5b4de98d05909beda66b8d941557e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E26 5428 bytes
font_01_sfnt_off00006091.bin
15afc128d2a9e2b6c7f5e157c4c620d08e364bc0a34ddbd249c71b533f4b0610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6091 10728 bytes

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