Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a617502e4888d3e…

MALICIOUS

PDF

56.1 KB Created: 2020-08-14 14:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bbdfa590964dc859a0c29cacca9232d SHA-1: 2f8fea8d6fcee77648e441d87a172c1b241ae68e SHA-256: 8a617502e4888d3ecdc45c9586ab6cabe6d26ef55b9e23556103ef42083cedfd
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=baus%20turbt%20pdf'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, suggesting a link farm or redirection strategy. The presence of a 'SE_URGENCY_LURE' heuristic further supports the idea that the document is designed to trick the user into clicking the malicious link.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=baus%20turbt%20pdf
    • http://files.hecklerancestry.com/uploads/1/3/1/6/131636689/gikigosufif.pdf
    • http://files.eastkentleafletdistribution.co.uk/uploads/1/3/0/7/130738639/863c0be64.pdf
    • http://files.ksyme.org/uploads/1/3/1/6/131606733/nisusobetirebixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/13705353033.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/titokuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/encyclopedia_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/dojugivobivuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8269/files/92704150123.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/86662944782.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/monster_blood_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/jugabamepasafotezezusuvu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/persona_3_fes_social_link_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/mcgraw_hill_teas_v_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/magic_item_compendium_3._5_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/85102234850.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_off00009161.bin
79d06546287e698b82cc502c6a3219b962349c2d020c4d7973348c93ec4f8270
pdf-font-stream PDF embedded font (sfnt) at offset 0x9161 4692 bytes
font_01_sfnt_off0000a14a.bin
8702eaf619c4f79594e1c2abd3898b305672caf72729224669dd111824e8d20e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA14A 10620 bytes
font_02_sfnt_off0000c584.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xC584 4324 bytes