Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0514f35068dbc01…

MALICIOUS

PDF

41.3 KB Created: 2020-08-16 21:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682053bedea906274b99af0b890e6516 SHA-1: a7ce7732d033e17d2e10f7020eaa46049641c341 SHA-256: e0514f35068dbc01357fa1e34940c8158b2e8e30c6d7f7c5f4822c08f24e379a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, disguised as a free writing paper template, likely leads to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further payloads.

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=free+writing+paper+template+for+first+grade
    • http://files.larysspeakeasy.org/uploads/1/3/1/0/131070792/volulorapeb.pdf
    • http://files.fransinotirta.com/uploads/1/3/0/9/130969960/tijuweburupag_jerefubuvez_kiveloso_lotani.pdf
    • http://files.kurthindustries.com/uploads/1/3/0/7/130775393/8027106.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/27758532671.pdf
    • https://cdn.shopify.com/s/files/1/0452/1361/4240/files/76875559099.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/76032864899.pdf
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/2979424643.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/autocad_clip_frame.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/12624369300.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/27626181701.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/cambridge_igcse_english_lesson_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/cbspd_technician_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4229/files/83654047672.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/68887421828.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_off00006125.bin
23ca1d7e44f9d15c60616bd27e3edb015deef4906f26ec537a014185cb55a152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 5408 bytes
font_01_sfnt_off0000738c.bin
828adb9e10268c8bdb7df7a2e7f3f4eb3503b0aa7a9b4423ece32c20766a7b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738C 10896 bytes

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