Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e3750de2aed816…

MALICIOUS

PDF

45.4 KB Created: 2020-09-01 00:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44da9e3be44e0696d9d42638485b888e SHA-1: 7a5ac640c931630141d0e668f16feae3865fd748 SHA-256: 36e3750de2aed816be4cacc88baa6ce7ab611cf405f25f90eac618bf2b21fefc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDF files. One of these links, however, redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. No scripts were extracted, and the document body is heavily obfuscated.

Heuristics 3

  • 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.
  • 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/wix?keyword=mount+kilimanjaro+climbing+guides
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/90482884469.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9288/files/zill_advanced_engineering_mathematics_6th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/nenaxamaxosofomikan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/oblivion_were_wolf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/zuxuwijuseneponerofo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0398/files/brat_diet_for_diarrhea.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/ugly_electrical_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/29488884135.pdf
    • https://cdn.shopify.com/s/files/1/0436/9773/3787/files/zanikitabeker.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/27610667712.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/halo_pc_cd_keys.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/learn_french_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/abc_tracing_worksheet.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_off000064ea.bin
037df4585fd7a4529649ab306d2f3df337f5cff5afd265d771e68650a3ea6395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 5428 bytes
font_01_sfnt_off00007745.bin
f69f6fcde86be856b2639201eccebc3029f7847e1c567c3a76ec54d92b9281ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7745 10352 bytes
font_02_sfnt_off00009aa3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA3 4324 bytes

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