Malicious PDF — malware analysis report

Static analysis result for SHA-256 3036534f98b7334f…

MALICIOUS

PDF

36.0 KB Created: 2020-08-29 15:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb13bf5a81982ebede0e6265c04edac4 SHA-1: a04a95084a35454d12f8c61c1a20e5e6913abe39 SHA-256: 3036534f98b7334f00cb184b8835d84c0d448bcc82606715211a77c7f6e15dfa
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=dabbe+zehri+cin+full+izle'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and other PDF links, reinforcing the redirection attempt.

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.ru/wix?keyword=dabbe+zehri+cin+full+izle
    • https://static.usrfiles.com/ugd/b8c837_63f930eeefe54607b2a09fbba739838f.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa41cc42dac843c99236204fb0eb4219.pdf
    • https://static.usrfiles.com/ugd/b8c837_77bc6dec948540dc8be5515f749ffefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/jekotovununoxowubamep.pdf
    • https://cdn.shopify.com/s/files/1/0440/3698/0886/files/40635529540.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/7792004703.pdf
    • https://static.usrfiles.com/ugd/b8c837_acd4e2360e3442e3b86e781b90b26e2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e61b36b44b9497eb033aba670c7ed9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9152adba514f4e8fa39da77a059d4bd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4528cdedf9f4bfa8a790608bcd52e69.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ca98d220124fa3a1cbac718eb95ff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ac85aa85a6c4456be04a1ff789b1937.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d34c880e3b14f44b39ab8d267b25c3f.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_off00004e0a.bin
5cd72857ea8200e1a36041673cdb7517f30d04fb60451bcaa5fbb297dbcdd9be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0A 4980 bytes
font_01_sfnt_off00005eff.bin
d4144d36958dd85efe7210b0270232562470c32d7d61aa44b8806ed989b3603b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 11352 bytes

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