Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3235499de84d45f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 00:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 493fe0e6444e74faa7b2f4e2df85d791 SHA-1: 1ad6368ce44f8d3a30181b6040b1b1d9b60b6639 SHA-256: a3235499de84d45f87023d0f0b3550a77597b1fb3d6c90fd477f5bee851d308d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.ru/wix?keyword=tunturi+e6+exercise+bike, is flagged as a malicious redirector. The document body contains garbled text but also includes the malicious URL, suggesting the primary purpose is to direct users to potentially harmful 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=tunturi+e6+exercise+bike
    • https://static.usrfiles.com/ugd/0047a4_72d74298981c46b3a31ff662b57e857d.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_fa94db9985f148e99e31fc26a9eaa012.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_0e4d4d9d3003429180c5e0c2af345110.pdf
    • https://static.usrfiles.com/ugd/3e5d97_02f6acf3f0594fc494db4811eedd2349.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/teviwalisoxojogonip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/vasixi.pdf
    • https://cdn.shopify.com/s/files/1/0451/0508/6616/files/bhagavad_gita_explained_in_simple_english.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a48830810ed4c32a71d3450ff964d25.pdf
    • https://static.usrfiles.com/ugd/e73fea_20eb2915c56b49be9d2b1a787c8b5a2c.pdf
    • https://static.usrfiles.com/ugd/764aaa_a7552be26ae04732989246dbdd5983b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff2533c4c3f4d0db9f272b2c5c62050.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e2ceeff3cc145b5b535b7725b6ce195.pdf
    • https://static.usrfiles.com/ugd/b8c837_74e0458252074051bff3d1f92af7861c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006407.bin
da2071460fd08e633bb754c23402093c8c517651c365f194fad6dfa2055d6de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 4924 bytes
font_01_sfnt_off000074cc.bin
991f7ef292b59849fa1804c361c52a6255426db797fbcab3b5d31d1f34ee76c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CC 2116 bytes
font_02_sfnt_off00007e77.bin
f80503e16ec90446b57a8ea9a361a745b1d1ab2b31ad656649ecf1a67fffb5c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 10612 bytes

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