Malicious PDF — malware analysis report

Static analysis result for SHA-256 28271a2b07b79a10…

MALICIOUS

PDF

43.1 KB Created: 2020-08-28 23:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a78f45fd56510652169754dfd864bfd SHA-1: 0a1a217831f09ed9a543e3f96e54b3d5efcedfe0 SHA-256: 28271a2b07b79a10b6c5cc4b6bafd8bd7a86f6d01d93890a1ae9ef2db0913c93
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 external links, a technique often used to obscure malicious destinations or to create link farms for SEO poisoning. One of these links, https://ttraff.cc/wix?keyword=line+dance+stepsheets, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its significance. The presence of a link farm and a malicious redirector suggests an attempt to lure the user to a harmful website.

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.cc/wix?keyword=line+dance+stepsheets
    • https://static.usrfiles.com/ugd/b8c837_259b529153ee4d06878348b75a9551b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e93bba4aaf294c8580a8d5815231a183.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac947309aaed413a945ce7c4bb124e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bda2b2792294a46a4d80023fb5bdc56.pdf
    • https://static.usrfiles.com/ugd/b8c837_1223f8ff604d46e9a51d45cecfe57785.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/bluedio_t4s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6182/files/windows_defender_windows_7_32_bit.pdf
    • https://static.usrfiles.com/ugd/b8c837_a749f06352934335ae43fd715734e904.pdf
    • https://static.usrfiles.com/ugd/b8c837_941a267a2d6b460f93fc17b5f551428b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddb5693a4e1948ef990733007f7e0f32.pdf
    • https://static.usrfiles.com/ugd/b8c837_7499261b048c48148410d7ed21b63506.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ed77a08ea746e39774dbfc7ea47fd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f4f84a6a05a415fadeb236f94690782.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_off00005f16.bin
b1335630f8dbffb2cb2b5159906a059861b89cac9ab33e146d13e11afb45cd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 3156 bytes
font_01_sfnt_off00006a75.bin
52a7b17c6e4c855700fd1f10afbbdc98c55f7f4dbb42f1ac6302bb674ef941b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A75 4976 bytes
font_02_sfnt_off00007b5c.bin
6f2fcc68880db7415c5c3c7f71ffb02205cf4e89dad135c1d4e158d62a6b8711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 10652 bytes

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