Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66c05dae4e9384a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 21:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ec7133d371a9414a1c563daf5a605e SHA-1: 4fbf37dd6111f8a9bad87a0fa4d9c41a9f66c53b SHA-256: f66c05dae4e9384a68a4de3e23265cbce62366482f67a3ba97108a3d498c71ca
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a question about asset worth, suggesting a social engineering lure. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to improve SEO for the malicious redirector.

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=what+is+a+den+beta+worth
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://static.usrfiles.com/ugd/b8c837_861183074ec84b019bfb727e8f6b6c40.pdf
    • https://static.usrfiles.com/ugd/4d6844_f78384c085c44e9db642ac5ef71d7f8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b556b6a3dcc648a1869f666da74c7f8d.pdf
    • https://static.usrfiles.com/ugd/33a16d_9360cbc41d6c4a54a129bb2ad6ad90cb.pdf
    • https://static.usrfiles.com/ugd/d5d855_4c3aef29cd9b4689a600f2cf4e5b31b7.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_55c452ee9c244ddb9a74f8f77f874c7f.pdf
    • https://static.usrfiles.com/ugd/345929_4c73a0607e26465f9da5941fe539b6d1.pdf
    • https://static.usrfiles.com/ugd/735424_b23b60c17f0348a8a7607940b023890d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d286f79abf0644a5884526e690d2d844.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/soxavajuzimurotodugi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/71862713006.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_off00007a4e.bin
4874614e11cf6079a80bd6cad751bdcb4ed304100729e18de070dc24e72bf0d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4E 5124 bytes
font_01_sfnt_off00008bc1.bin
956ac14e4cf6267e71dd896ad6aa5d61d27d2684127b1adf918c4e02157f2555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC1 10328 bytes

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