Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c01385add46bd8…

MALICIOUS

PDF

44.3 KB Created: 2020-08-16 00:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc8bb6fffb517e242a1dd5785139798 SHA-1: 9c99968e2a78dc8ae37046d61bb7c0b5cb871d04 SHA-256: 94c01385add46bd87d3b359503aa4ee2670dab6bba13208885e39127e3ec8916
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=vehicle+checklist+format+in+excel'. The document body, though heavily obfuscated, contains text related to 'Vehicle checklist format in excel', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness. The presence of many Shopify links, while some are benign, suggests a link farm used to obscure the malicious destination.

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=vehicle+checklist+format+in+excel
    • http://files.washingtonactivities.com/uploads/1/3/0/7/130739544/tamirorukase.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5915/files/kotafonidivedafuroturikuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/discord_loading_messages.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/jejonavuraxusamexil.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/jay_rock_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/7706452343.pdf
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/xusowo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/tagededimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/47959384684.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1736/files/96934458751.pdf
    • https://cdn.shopify.com/s/files/1/0453/4947/0363/files/el_neoliberalismo_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gizadiwilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/autocad_export_low_quality.pdf
    • https://cdn.shopify.com/s/files/1/0438/4283/0496/files/49980075064.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633b.bin
d3f28f3f9dfdc0354bd1f02feae6d0da0e0ff538be2057dc95d1d9f90061f6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 5008 bytes
font_01_sfnt_off0000740b.bin
0de3afcdf403c7cdefab9976116773a64f402052fb8331721428a2a638e54c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 9948 bytes
font_02_sfnt_off0000961a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x961A 4324 bytes

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