Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2b934dc2a18412…

MALICIOUS

PDF

36.2 KB Created: 2020-08-27 18:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64c917c58a1ccb61be84af9630f6f2d4 SHA-1: 1cb1bf4de6afbc3bcaf51409ae55caae82773749 SHA-256: eb2b934dc2a184124289b86f435ba297e25c72133a460bda94951bd748eb1be6
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, disguised as a textbook download. The primary malicious URL is https://ttraff.ru/pify?keyword=college+physics+serway+vuille+10th+edition+pdf, which is likely used to deliver a secondary payload. The document body contains obfuscated text and numerous links to external PDFs, many hosted on Shopify, suggesting a link-farming or redirection tactic. No scripts were extracted, limiting the analysis of direct execution behavior.

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/pify?keyword=college+physics+serway+vuille+10th+edition+pdf
    • http://kuzop.tuxowner.com/uploads/1/3/1/3/131383483/d732d7.pdf
    • http://files.myveganmorocco.com/uploads/1/3/0/7/130776490/1052406.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/biblia_de_estudio_macarthur_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/3847/2357/files/business_plans_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/dogoxukanuvorulej.pdf
    • https://cdn.shopify.com/s/files/1/0462/6540/1495/files/running_on_empty_book_jonice_webb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/pekezigisugodolavew.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/tukofabapigonisulebuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/bilibusofuniki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/74170455198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/51286058424.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/vogezenoser.pdf
    • https://cdn.shopify.com/s/files/1/0435/3536/8346/files/56745785167.pdf
    • http://ngl.cengage.com/search/productOverview.do?Ntt=9781285762494||14938879726403084663027655746190
    • 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_off00004cf7.bin
36cedd3e73e31bbaa72b71d200b11cc05c1b23e71ae3e176d6e7cce348ade33c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF7 5772 bytes
font_01_sfnt_off000060be.bin
9c6c8c56ab11f1b26ece2bc02ae9eaf83b54347645f92207a3480fa7c7aa8bdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 10444 bytes

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