Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4ef5814c863293…

MALICIOUS

PDF

40.7 KB Created: 2020-09-02 09:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 627a3c46b65b96dd016888c6b9224716 SHA-1: 668c6592eeedbbf2ebc76e7afb21cf3689c34b72 SHA-256: bf4ef5814c863293a1c721dc10bba771efdd67b78c8cba041ea114fbac24d6e7
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=dead+by+daylight+pc++windows+10'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. The document body, though partially corrupted, also contains the primary malicious URL, suggesting a lure to a malicious site.

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=dead+by+daylight+pc++windows+10
    • https://static.usrfiles.com/ugd/b8c837_a153936927df48dbbdf7ad9dd26bfb88.pdf
    • https://static.usrfiles.com/ugd/1c90dc_2a5e68a6fa9945b5801e5276a3004f01.pdf
    • https://static.usrfiles.com/ugd/f34823_fae899baf5924d49b03732f5b51f892b.pdf
    • https://static.usrfiles.com/ugd/41f880_a72a4d297529407597f6d761c47bf447.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6d535e08de14c388e95b2ff94021b16.pdf
    • https://static.usrfiles.com/ugd/b8c837_35eddabeec164694aa16ed90af27fc0c.pdf
    • https://static.usrfiles.com/ugd/8b9728_4242e423d2cf4f518dda29f84b25cac6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f8bb2eb0fc340af9d1700524db704ec.pdf
    • https://static.usrfiles.com/ugd/cac9e4_96658346fd2f4aad8e43bbf639b60d04.pdf
    • https://static.usrfiles.com/ugd/7ff653_5dc53d8c4ec047c0b88c3f4596d7caa2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/31385825819.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/autodesk_sketchbook_unlocked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0747/4844/files/candide_novel.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_off00005fa2.bin
888d92600fd32a8921e252ceb93be828f3c749a839031fe036fc7df77def7c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 5764 bytes
font_01_sfnt_off00007361.bin
18d61cb4ce36ac7b15e1b35563ff3b2c89033163e379e2245c685f2720857c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 10284 bytes

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