Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f2f24474b76bc6…

MALICIOUS

PDF

38.2 KB Created: 2020-08-01 15:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23a5079d4595ebd3afbee5e8457c93ee SHA-1: 36b8d4e1484578e9434c342819607fd47bb1b1ce SHA-256: 14f2f24474b76bc68a6bcfa593bbceed59acc78a87f77be84c5d5ef254145f09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external websites. One of the primary links, 'https://ttraff.ru/pify?keyword=aston+martin+logo+png', is flagged as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to create a link farm for SEO manipulation or to direct users to malicious content. No scripts were extracted, and the document body is largely unreadable binary data.

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=aston+martin+logo+png
    • http://files.nsm-glh.com/uploads/1/3/1/3/131383575/c63f4d9a5a.pdf
    • http://files.clothdiaperdepotusa.com/uploads/1/3/0/9/130968934/tibapizazuja-goges-livasef.pdf
    • http://files.defeatmassincarceration.com/uploads/1/3/1/1/131163669/ca08f64.pdf
    • http://files.thegabhub.com/uploads/1/3/0/7/130775876/2518653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/pepelan.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/87903285019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/tunomemoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/19856666290.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/fanod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/xafab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/97280816384.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/57459827704.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/kesakaxukuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/ripibefopadefabumumitevov.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/37891145755.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_off00004c27.bin
67103eb83e1bbc3deea8869eab43b86734cda883753a78b57dfd7d2b84d14de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C27 4800 bytes
font_01_sfnt_off00005c40.bin
7bef88f8e78cc77486fc5ace0debd0fafbf0202049cc2b1113674fb8211d4610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C40 9836 bytes
font_02_sfnt_off00007de7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE7 4324 bytes

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