Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bd0c1cc1798cb3…

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 12:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93a573edbe96c1f18faeece0d3eed676 SHA-1: eb69197e2455dda7e6dd3dd2be725c3c800d5dc3 SHA-256: 81bd0c1cc1798cb35006aa4b249985a242528925d3c574067f0388a681a18a77
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically flagging it as a PDF SEO link farm. Another heuristic identifies a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/wix?keyword=high+tail+hall+twilight+cavern, which is likely used to redirect users to further malicious content. The document body appears to be largely obfuscated or corrupted, but the presence of URLs and the link farm heuristic strongly suggest a malicious intent related to link manipulation and redirection.

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.com/wix?keyword=high+tail+hall+twilight+cavern
    • https://static.usrfiles.com/ugd/36f25b_cf478707d9bd4f57abbef8d5788c9419.pdf
    • https://static.usrfiles.com/ugd/9219f8_aa006d611fde44c4857a727795eb7b1e.pdf
    • https://static.usrfiles.com/ugd/b85eb0_4cffaeb4d15a44708150769287dad629.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2de1530d9a40f7a8d9d9c9c6652491.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd09c383339a480bb46b21b5c0a4a224.pdf
    • https://static.usrfiles.com/ugd/b8c837_71554124eb744b69b7c2ee187cac80c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_0992f025c53541fca04e5c472a853b50.pdf
    • https://static.usrfiles.com/ugd/b8c837_02a60b90fdae42d2b0f0ddc9c69aa836.pdf
    • https://static.usrfiles.com/ugd/b8c837_5915ebbfb8bb455f8e6a356e97e78d53.pdf
    • https://static.usrfiles.com/ugd/b8c837_80c93bb4d72743eb9c31383b59dbb8ec.pdf
    • https://static.usrfiles.com/ugd/5b5da7_78a633d564f640e8a008636b20bbc03d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0d43d1519814115b32301c81109aad9.pdf
    • https://static.usrfiles.com/ugd/ee6770_c255d95ebb8147d48cf0d444aa8f3eb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ad0c5470d84547a3b459b64627caf4.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_off00007411.bin
6c7cef7470ca0954dfde8ccc3152134694e752ee1a6db4c4521611290fa40fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 4996 bytes
font_01_sfnt_off00008526.bin
75514ff734ed9c746b70dcbdf67e3236e81bc170069cfb6dc73b5925574006b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8526 10412 bytes

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