Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad75d3e0089f4a70…

MALICIOUS

PDF

39.1 KB Created: 2020-09-01 11:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79babf7a28b421d8f76ebdc9c3389ad4 SHA-1: 3ace8a36403d866066c7cbb7fbfe72b8a0a30b9a SHA-256: ad75d3e0089f4a70ee4e1fb38fb5eef29e341e49d6e03e5ac038309d43b492d5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning or link farming. One of these links, 'https://ttraff.club/wix?keyword=italian+accordion+music+s+free', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous links to static.usrfiles.com suggests a coordinated effort to distribute content, with the ttraff.club link acting as the primary malicious entry point.

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.club/wix?keyword=italian+accordion+music+s+free
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.pdf
    • https://static.usrfiles.com/ugd/fd30ac_119989481bc647ecbe9fe313adc55563.pdf
    • https://static.usrfiles.com/ugd/b8c837_82c4394a3f19487da9638d2a4cc288e7.pdf
    • https://static.usrfiles.com/ugd/b972d5_7ef77a7ade5b4826842c078430f555f4.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/rosolipajoribok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8428/files/54854804099.pdf
    • https://static.usrfiles.com/ugd/67f5f7_e882204c309c48ceb78dc91d2a189b4c.pdf
    • https://static.usrfiles.com/ugd/6846fe_ddebd1a8e89542849d19b3b5c910ab11.pdf
    • https://static.usrfiles.com/ugd/b8c837_baae777784bb4397a14ffd8809009b05.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_f572a820a2e441cbb2d918f7da3973d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_682d915c828e49ccae42f5eabca10abc.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_off00005dd7.bin
c817f1c5e50f760dbf7e53cc6556add9bf3dceb9b74e81e1734b762fb3734f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD7 5104 bytes
font_01_sfnt_off00006f1c.bin
54b44041580155a01473e4c2f439d3f91af7ec1e23b9900b2974cd2803922d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1C 9656 bytes

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