Malicious PDF — malware analysis report

Static analysis result for SHA-256 7071854b8081a6f0…

MALICIOUS

PDF

45.2 KB Created: 2020-08-28 11:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7299c93c8982222cd3d0279427498794 SHA-1: f4894bb7dd552ced7a6422b40904e4694feded00 SHA-256: 7071854b8081a6f056593cca9bb80bb840d14048c029a9709c7543b7cc7f7e47
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, masquerading as training materials and tractor parts, which is indicative of a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector infrastructure, suggesting an attempt to lead the user to a malicious site. 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.ru/pify?keyword=barista+training+guide
    • http://files.gregdwyerart.com/uploads/1/3/1/3/131379894/regofe.pdf
    • http://files.momentum-lab.com/uploads/1/3/0/8/130874489/xesegag.pdf
    • http://bulex.circlecitydanceproductions.com/uploads/1/3/1/4/131436967/wubixenede-lujinaral.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/branson_tractor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/30877508816.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/pututijeriwiwinifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/kekafemagojo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/nijunog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/75205076802.pdf
    • https://cdn.shopify.com/s/files/1/0440/5071/0693/files/fosajokaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/pagamamib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/24900204905.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/90129925119.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/85131455575.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_off000066ba.bin
2e0f87476d2783e3f56a64ac3055f4f96155e7cf16117ca64a783eab19079d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BA 4780 bytes
font_01_sfnt_off000076fa.bin
0ca3a0cc6da8ed7344bfe222c3520171882cfbc9b75f408a4a68bc349c30f611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 10288 bytes
font_02_sfnt_off00009a33.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A33 4324 bytes

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