Malicious PDF — malware analysis report

Static analysis result for SHA-256 3183793ee6fc90f6…

MALICIOUS

PDF

38.9 KB Created: 2020-08-12 12:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4958d03c805d91a4f8de0f3b35254f14 SHA-1: ca382d4657e2a16cf269d78d5583e1de173a8c02 SHA-256: 3183793ee6fc90f684f8c9c5be513274bdd532b59705a5ed487671bafc120d78
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wb?keyword=mathematical%20methods%20notes%20pdf'. This indicates a social engineering attempt to trick users into visiting a malicious site under the guise of academic material. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains but likely serving as a distraction or SEO manipulation. No scripts were extracted from this sample.

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.com/wb?keyword=mathematical%20methods%20notes%20pdf
    • http://lisolis.asiehart.com/uploads/1/3/2/6/132681556/973418.pdf
    • http://lubar.littletoncrabappletrail.org/uploads/1/3/0/9/130969352/xuzafadudatizami.pdf
    • http://kovunu.discoverychilddevelopmentcenter.com/uploads/1/3/0/8/130873790/966637.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/filariasis_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0440/0968/5157/files/escuela_fisiocratas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/44018388556.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevola.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/11493548224.pdf
    • https://cdn.shopify.com/s/files/1/0437/5353/7690/files/jewufefomuvuvapapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/vofuvinodedelejexaxizone.pdf
    • https://cdn.shopify.com/s/files/1/0438/3437/6352/files/cds_2_2020_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/tuvuxuwuzimexupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/5263455393.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2711/files/ending_blends_worksheets.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_off00005b2b.bin
1e1b4c8ff9057232453c0272e7000673efe66a9677f10a2433206823046cb36d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2B 5304 bytes
font_01_sfnt_off00006d1d.bin
865881060af3d71a54e7cb8a91f98099063bdb24b30e4f414c899609315d3a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D 9836 bytes

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