Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20bfb290443c2b9…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 13:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d432b4bbba62a352ba71f623efd8f52 SHA-1: 07ba54396b1ab614fc85173284ba2069718cfd3b SHA-256: e20bfb290443c2b9844f159a91b670376ae10ad153a90fa979664aa381ad0fa6
120 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.cc, which is likely used to deliver a secondary payload. The document body and embedded links suggest a social engineering lure, attempting to trick users into clicking the malicious link by posing as a download for 'Instagram for mac os x'. The presence of numerous other PDF links further indicates a link farm strategy to improve search engine ranking and visibility.

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.cc/pify?keyword=instagram++for+mac+os+x
    • http://files.skatetown.net/uploads/1/3/1/3/131379382/pojefeb.pdf
    • http://files.claresholmminorhockey.com/uploads/1/3/1/0/131071315/3021950.pdf
    • http://tuwiv.alpujarra-granada.com/uploads/1/3/2/3/132303134/naronumetuzeru.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/13864639344.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/cessna_210_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/34337282598.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/modasuwejezatotexiwedidax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/6299679465.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/zonolanudimagaxosedod.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/ielts_writing_task_1_answer_sheet_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/9463275788.pdf
    • https://cdn.shopify.com/s/files/1/0434/8539/7152/files/sql_stored_procedure_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/honeywell_fire_alarm_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/bottle_blowing_machine.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eca.bin
4955201c54615f3f7c32f366a68b3270607d7c8b1923c508ecbcf969875cebff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 5176 bytes
font_01_sfnt_off0000704a.bin
7a40db221009812b9a17a05498a046fbdc37057f73b70ee882f82fa661246394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704A 9928 bytes

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