Malicious PDF — malware analysis report

Static analysis result for SHA-256 541af7a577cad507…

MALICIOUS

PDF

33.0 KB Created: 2020-08-31 03:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68fcbd0f2cc695a503fb20c82e73e7a3 SHA-1: a131e90a0a3c2d6605412528ed6d676075935089 SHA-256: 541af7a577cad507b6c2194bb48896e93eae189164b9638dcc22621e2e803a85
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=eighth+grade+streaming+vostfr'. This URL is presented within the document body, suggesting a lure to trick users into visiting a potentially malicious site. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on static.usrfiles.com. The primary intent appears to be directing users to the malicious redirector.

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=eighth+grade+streaming+vostfr
    • https://static.usrfiles.com/ugd/b7ed05_8dd7769e6ae94821aa72dc8716de6249.pdf
    • https://static.usrfiles.com/ugd/3aee12_e04eda023d434e6ca4e47d5cc163bfa9.pdf
    • https://static.usrfiles.com/ugd/253000_43218945f34540c281c154cd2aa9e08d.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/xufugupuzivavukalo.pdf
    • https://cdn.shopify.com/s/files/1/0462/5507/9573/files/define_platform_technology.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/figutakovex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/vukipalez.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/git_add_existing_project.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6c97b325978480dbf153dd2a6de8c26.pdf
    • https://static.usrfiles.com/ugd/3e87bf_141538f6ae0344c38983152cc9216de7.pdf
    • https://static.usrfiles.com/ugd/db1da1_d2b4f059272c4ef49ec96fa9b8bec471.pdf
    • https://static.usrfiles.com/ugd/15cd4d_9d0e408ecd9d4aca87055baf088568fb.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_a0bb3d313bd448b1aba4808f4fb76dba.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_off00004412.bin
fd40e165791e1d7f112d34e3105900ea7c12a4ffa62b84244f6d9a2a3d883706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4412 5304 bytes
font_01_sfnt_off00005606.bin
b177fb62e05443e816f2861a5bbf1d10400ae01d736a9f36c99992a93c96a6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5606 9952 bytes

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