Malicious PDF — malware analysis report

Static analysis result for SHA-256 889ccd77ef93e76d…

MALICIOUS

PDF

85.2 KB Created: 2020-08-30 06:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a467e1d52f8d26380f91e9b67b55dab SHA-1: bdfa0d9e0ff7b059b2cf8b65650b2cdb3bf286f7 SHA-256: 889ccd77ef93e76de020e1097c9532422f776c22bc42534e363a8ba97fae3298
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, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.link/wix?keyword=righteous+wrath+of+the+faithful+3.+5', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to the redirector's keyword, suggesting a lure. The presence of numerous links to static.usrfiles.com, even if benign, supports the link farm heuristic.

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.link/wix?keyword=righteous+wrath+of+the+faithful+3.+5
    • https://static.usrfiles.com/ugd/b8c837_ae1002feafd14e38a9b8b3d76a79c158.pdf
    • https://static.usrfiles.com/ugd/97493d_78231867c4c3425fb314f99c3493a37f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a197002e1a48ee833a6cc440b77a39.pdf
    • https://static.usrfiles.com/ugd/12745a_e4c88ba066184d3ea67bfc09593f194c.pdf
    • https://static.usrfiles.com/ugd/b42fd6_33f60bc422dd41e387c606c0711304a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_011cb1c16cc1455e9a0c6e68e1e63d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78163a9bbf3495c8c4378ef908fa1d9.pdf
    • https://static.usrfiles.com/ugd/289c5e_acb49f4d49c54228907bf8f7b8148d9c.pdf
    • https://static.usrfiles.com/ugd/f84671_0c4ba4f0749a42038fa3a2d48d0b0abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeff4ba2c74d4a128f8b9975cb84a643.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_off00011103.bin
eddcdc63d4f472d7ca417417f997c248d4e40aa77eb2fa672782484d72175185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11103 5448 bytes
font_01_sfnt_off000123ac.bin
afeb450d9317e9a7674cfa2d3a1c08457c489d286aca1a4be392754ba3543864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 10512 bytes

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