Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4a5314ea5a9d21…

MALICIOUS

PDF

55.1 KB Created: 2020-08-15 02:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79737e8a34e9afea330a3582f45c3f13 SHA-1: e385db2dcf84a2fe991bad902ca4d4bf441937dd SHA-256: bf4a5314ea5a9d213987669274d40b5503900b5906f96d146e763a1612569741
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=pragmatic%20programmer%20design%20it%20pdf', reinforcing the lure. No scripts were extracted, but the primary attack pattern involves redirecting users to malicious infrastructure.

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/wb?keyword=pragmatic%20programmer%20design%20it%20pdf
    • http://degev.bmwclubulstersection.com/uploads/1/3/0/7/130738909/2472934.pdf
    • http://files.fccswimanddive.com/uploads/1/3/0/7/130776131/a917149571e8f2.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9421/files/68198102162.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/31096970263.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/ugk_international_players_anthem.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/mariah_carey_hero_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/3020/8924/files/bamamuduzokaromumedamiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/60152102694.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4661/files/strength_of_materials_objective_type_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/prot_paladin_stat_priority.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/present_and_past_tenses_elementary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/57514896669.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/georgia_driver_s_licence_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/cinderella_3_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/72777858061.pdf
    • https://cdn.shopify.com/s/files/1/0439/9572/5982/files/fenumigogiwetiridu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076da.bin
f0ac8a39787eab68124c0af3db32bf1a74b50b72b7c0c942241b31794060197f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 5444 bytes
font_01_sfnt_off00008935.bin
39ff23a6dc67a31d236fda64b9ac1dc2c87c12abefb50033719a5f953acc7650
pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 2072 bytes
font_02_sfnt_off000092e4.bin
4bef244d81e7174adabc772db3f2aa08fcb8f6fb38de240e1946cad86eea99e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x92E4 10300 bytes
font_03_sfnt_off0000b649.bin
2b6805f30c6330d088b0dfb3deaa87ba9c6df6e9da473848b193cd2521195838
pdf-font-stream PDF embedded font (sfnt) at offset 0xB649 17020 bytes