Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef159672582b6b3…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 17:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47fbd7a7fc7fafd9b86e93f4f1109366 SHA-1: c8b13ac0b5ab629fdab0751232d3de87802c44b4 SHA-256: 2ef159672582b6b3e32bafa7c9b03bf1a2fed4b8bb67fe955ab7eadb535416d0
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used to distribute malware or conduct phishing campaigns. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=trade+mindfully+pdf'. Another heuristic identified a PDF link farm with 24 external links, predominantly hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs, reinforcing the malicious intent.

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=trade+mindfully+pdf
    • https://static.usrfiles.com/ugd/8b97dd_51f9034119254b72829da717474cf352.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0b9f2e80a844d1cba436aabd9056d62.pdf
    • https://static.usrfiles.com/ugd/b8c837_85635d7466d743ad8e7bf55c2c99e269.pdf
    • https://static.usrfiles.com/ugd/89064d_59c396472d5449d3b5dcfbcd58b5d0d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_564a652eb83b4f5a923aa5e0bee86d9a.pdf
    • https://static.usrfiles.com/ugd/ca32a8_7e23907a479c42d682e5e6cac226833a.pdf
    • https://static.usrfiles.com/ugd/ce5d00_b91a2603c9a145f6b4c8bc376515c064.pdf
    • https://static.usrfiles.com/ugd/5438e3_61da27c7cf0847eeaf5d8b7ca42accba.pdf
    • https://static.usrfiles.com/ugd/0c41e7_a120955a244646598d19cc21b4e7c484.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd8b6f5a2be84ddaa470b7977464cb9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_89cc82cb06bd47df83cc7842ad9e5c91.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e801cfe74ae4804bee56ed40a5a27b0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cbc.bin
0e87d9dd6c89283497847a604c7ba1c0ac24fe218f22e0a31c36563a1bad43ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBC 4752 bytes
font_01_sfnt_off00006cbd.bin
163a3ad92b8aed916d47cc79e089f1e5c4b2bfeb11ddc21136717f1a3f480ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 9908 bytes
font_02_sfnt_off00008eb0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB0 4324 bytes

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