Malicious PDF — malware analysis report

Static analysis result for SHA-256 3442a3332dd0093a…

MALICIOUS

PDF

46.5 KB Created: 2020-08-17 15:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24a7e457044ca9e5ea196bb7ea2e3b3a SHA-1: ec1099e0de6ef1c63a809948bbfebac6c0e49a6e SHA-256: 3442a3332dd0093a6a199195ecb2871c9253f982b2d8e994b33de076d4d9cf1d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (https://ttraff.cc/pify?keyword=argentometri+fajans+pdf), indicating a potential distribution point for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=argentometri+fajans+pdf
    • http://files.outergraceboutique.com/uploads/1/3/1/0/131070611/tovebe-kigalosopevopuf-pakato-togitavupifazi.pdf
    • http://files.murdermysteryparties.com.au/uploads/1/3/1/0/131071167/balaxewixon_wivaram_kumur_lefidu.pdf
    • http://files.thecommonwealproject.com/uploads/1/3/1/8/131872104/6343135.pdf
    • http://files.humanoriginsworkshop.com/uploads/1/3/1/4/131452952/niwoleb.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/jejebixofabide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/binary_options_breakthrough_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/22321009770.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/artificial_intelligence_a_modern_approach_3rd_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/oxford_arabic_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/lipepapetitolidegep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/4425416730.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/vusijekimokupesemusovevax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/fopememonunuwomixa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069dc.bin
50d94ef29ac85f6c4a083071b0dc69e6c423c073c0f9f258f9592e50426ffba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 1684 bytes
font_01_sfnt_off00007241.bin
89539dc305affe532475a2549867548628ee5eb6e1677cff5de31f7129f23e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7241 5392 bytes
font_02_sfnt_off00008480.bin
e4747be41a02cb2d1fef70e56fc0afeea921bff363e483660e834963e3a9d13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 12368 bytes

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