Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bd3811cd827efa…

MALICIOUS

PDF

35.2 KB Created: 2020-08-09 04:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a83b9b03c32facba3346a9a3d21f67f SHA-1: d0418ffe13288ec1fa46bc4dff03fb0c1616ca77 SHA-256: 74bd3811cd827efa08d63e0ec64252aafa64228d99c12af0806f70b041f63f3a
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector infrastructure known for malicious activity. The primary malicious URL identified is https://ttraff.ru/pify?keyword=capitalismo+e+liberdade+download+pdf, which is flagged as a known malicious redirector. The document's structure and the presence of numerous links suggest an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=capitalismo+e+liberdade+download+pdf
    • http://files.talismanmag.net/uploads/1/3/1/4/131453045/5725287.pdf
    • http://wojav.crime-fighters.com/uploads/1/3/1/6/131607600/1453613.pdf
    • http://gezox.poetsinthegarden.com/uploads/1/3/0/9/130969204/37edc008d9a.pdf
    • http://files.corpsefeed.com/uploads/1/3/0/7/130776075/lewapa-vexezakirefodob-nekanimuve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/buwatodajujibevenope.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/wamapavizavopivutitezuwit.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/kevitase.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/honeywell_pro_6000_install_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/78915842395.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/midapatidiniwowuperolenod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/radubolebevafobeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/callback_function_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/13742698148.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/kukusofepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/kurodokorozogivemisov.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_off00004c21.bin
04a3a738448db7dda8a39af5b39cc45b060d179ab2003212f6f3800a8a71a67b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C21 5324 bytes
font_01_sfnt_off00005e26.bin
5de505c48276b514349e0076322cd5e0640b4c2d0e4f47e5fd70f4781f1fcece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 9880 bytes

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