Malicious PDF — malware analysis report

Static analysis result for SHA-256 77abde0fd298b0bf…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 23:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f7bd278581667393a9f5aa3bf5d1d0 SHA-1: 4c47d3bef7d05fdf013990fbebd45c50c9f71be1 SHA-256: 77abde0fd298b0bf2699a61ea3bb40552bfe46c1ee9786040b7aaa52e76e9f25
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create SEO link farms or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/wix?keyword=lower+extremity+arterial+doppler+report+template', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on static.usrfiles.com, suggesting a coordinated effort to distribute 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=lower+extremity+arterial+doppler+report+template
    • https://static.usrfiles.com/ugd/ea78e0_8ab94ccde2d74eaab4184e52b0a29711.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_8313c8b41d7b415fb3d61e8e98ea644e.pdf
    • https://static.usrfiles.com/ugd/b8c837_127ad9de0e584dc4a04621d157952736.pdf
    • https://static.usrfiles.com/ugd/83d902_913bf78fef27426e856ab56790ffaef3.pdf
    • https://static.usrfiles.com/ugd/7dd30d_1ed2965a06c04d82a66385e92182a002.pdf
    • https://static.usrfiles.com/ugd/a838c0_fc6d6dc9ebbd4c1ba0000e02e466179c.pdf
    • https://static.usrfiles.com/ugd/04c368_ee95d7e2ba5948a2844cab05cf7c9317.pdf
    • https://static.usrfiles.com/ugd/b8c837_75a434bea9084e5ca4fdfe3bb1499848.pdf
    • https://cdn.shopify.com/s/files/1/0463/4286/5057/files/antiformiche_per_piante.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/40013758491.pdf
    • https://static.usrfiles.com/ugd/02beb7_59b369ff46a2480f99cf601e018732a7.pdf
    • https://static.usrfiles.com/ugd/822ecd_bdee87a35138444a8400b5a49ee18247.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_off0000694e.bin
9606e784cd7ba4d0b052c5cece5805eba2bb18ef311084df438488f4a20beb75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 5128 bytes
font_01_sfnt_off00007ac5.bin
c6044d5e81381d135f2ce6d773468908cc5b05efc2f913590a63f728b3e5915e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 9952 bytes

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