Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f83426583ce153…

MALICIOUS

PDF

37.8 KB Created: 2020-08-29 03:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4660b2a7f6d353a455f906e338977cbc SHA-1: 6875c6c1ec76b541b81bb6ac77612b40b48f8bf5 SHA-256: 57f83426583ce15349c8da84e2937376b9d6f6b276f518b1060faedf7715efb5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, https://ttraff.ru/wix?keyword=nuevos+lineamientos+de+consejos+tecnicos+escolares+2017+pdf, is flagged as a known malicious redirector. While many other links point to benign Shopify-hosted PDFs, the presence of the malicious redirector and the sheer volume of links suggest an attempt to manipulate search engine results or distribute further malicious content.

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/wix?keyword=nuevos+lineamientos+de+consejos+tecnicos+escolares+2017+pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/bloody_sunday_russia.pdf
    • https://cdn.shopify.com/s/files/1/0430/7347/0618/files/67289392920.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/kevuvekef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/wujagome.pdf
    • https://static.usrfiles.com/ugd/b8c837_27658155b2dd4e2f99d7be761abcca94.pdf
    • https://static.usrfiles.com/ugd/b8c837_b738e5dffafc4076b03d0937c32119c3.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/7465280683.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8274/files/40626271106.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/event_coordinator_resume.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/figural_analogy_questions_and_answers.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_off00005146.bin
f9c59c106d943f0271580be82d027fbc50a5a62fce797d61a57135f1d6cfc9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5146 5812 bytes
font_01_sfnt_off00006515.bin
ebdc88e6a913809bddb420cb2677e7e4217ea2fdb89339463cd5804f65c6a741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 10960 bytes

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