Malicious PDF — malware analysis report

Static analysis result for SHA-256 90664b0baa1896d8…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 14:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af09fc042827a63fedf6b237ae5f2962 SHA-1: 49076b886d09835b7c6d489e20a48e63f37778ee SHA-256: 90664b0baa1896d8187ac966e90850d0586b5fd29c5013496267a160f8155392
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=stamina+rx+information'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure for the user to click on it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=stamina+rx+information
    • https://static.usrfiles.com/ugd/b8c837_4a38b91aee22431499a9fc49b698dd39.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c1c4776a22642fbbaf989703f567dec.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7d1e08b2b22426390614c8d885f4e7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_88218eff24bf439d88857ad7bd5bbd51.pdf
    • https://static.usrfiles.com/ugd/b8c837_9021e0a4d19a420d9e7f540be05bb835.pdf
    • https://static.usrfiles.com/ugd/8c2aca_67a4ebfe7e8845e298743b5e2f39687a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bec52530e3245368dd8b5539a8d1336.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fafe1556de04878b0877aa3f90d2071.pdf
    • https://static.usrfiles.com/ugd/b8c837_e03fbc2826624aef8dd0d6211dca4743.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c44688fb1614e98a61eb30f5d19554f.pdf
    • https://static.usrfiles.com/ugd/b8c837_668e81b89e9741bb83929efce7f71966.pdf
    • https://static.usrfiles.com/ugd/b8c837_423c301879d8486aaae3e6d17345271c.pdf
    • https://static.usrfiles.com/ugd/b8c837_81171a28561940d09ed1a8e461cc24b1.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_off00006726.bin
00e87ce3c98041a1070fc85e79611343dd3299a30724de07d7976aff115e59a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 4872 bytes
font_01_sfnt_off0000779d.bin
e475a0db20e5f348688f0728c2b54ed5a186637dbeb51a954f1fbb8ae1499502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779D 11392 bytes

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