Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67da16f55bfc88b…

MALICIOUS

PDF

34.4 KB Created: 2020-09-01 01:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48f5a73aa3ee54963df1e96bd25a4cb7 SHA-1: 0e5ed12b3a8c1c0e8ec4927fc4bab7e8af703822 SHA-256: c67da16f55bfc88b55e492721e1863c3e7f3ccfa4594c338156f64495b3f0e98
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=scyon+axon+cladding+installation+guide'. This URL is presented within the document body, disguised as a cladding installation guide. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to static.usrfiles.com, likely to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

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=scyon+axon+cladding+installation+guide
    • https://static.usrfiles.com/ugd/d5415a_72b6d07a1bd142f38adad45fa59a2d77.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.pdf
    • https://static.usrfiles.com/ugd/f103bb_528aaf35b49249bc8edc0b5b066fc94e.pdf
    • https://static.usrfiles.com/ugd/18122d_d82c5baff6044a8680516ce7e23c175e.pdf
    • https://static.usrfiles.com/ugd/253000_fb4ad45012c14efbabf443e92c85e99e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e6aea36c5cd4d009ef0b9ffa9e8055f.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da4e260a7745cea480e065b662638a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec97949417784b42addb4dcfc33af21e.pdf
    • https://static.usrfiles.com/ugd/b8c837_70794ba9d425445caab772f7e50515e8.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_off00004944.bin
be5c4e8a9c7bba9b456e2d5be709b8d942ab454f6748a838c85782af8282a75a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4944 5284 bytes
font_01_sfnt_off00005b5e.bin
9d8a3d30b49b0d2f9ff840cb6d245f821d6397c9ec50b60401b3303e8c44f59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5E 9896 bytes

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