Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b93eb83a39c870…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 13:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 477a1f8aec7b2f247a48c1cdfaaa19af SHA-1: 5eb4d63bd4ea412c42a3d2d6a80ff8a3586f77c6 SHA-256: a9b93eb83a39c8704a4238427eaa39c82951f635c415b0f0ed14aa557de7f0f2
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=shards+of+honor+epub', suggesting a lure to download further content. The presence of numerous links to static.usrfiles.com and cdn.shopify.com indicates a link farm designed to obscure 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=shards+of+honor+epub
    • https://static.usrfiles.com/ugd/b8c837_0f8bb2eb0fc340af9d1700524db704ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3b43b291c5e40c28f94e13b21089103.pdf
    • https://static.usrfiles.com/ugd/b8c837_e970a08bb34040f18b03cb4b73bfd364.pdf
    • https://static.usrfiles.com/ugd/41a0b6_6c339d5660184a08803a98f567878b46.pdf
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/44873310049.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/lisupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/74214877347.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/33603803119.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/46683299972.pdf
    • https://static.usrfiles.com/ugd/b8c837_14cb80bdcb40485c9783e7d101722bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9f0b932ee554fec96eb601382c7aa5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_10a7d7fedf6448ba81882450d8f9e622.pdf
    • https://static.usrfiles.com/ugd/a2e20a_ebd4ed7d2af14dceab6eb28e195da9cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_dec6a04668c64a0c89e271493b630ae2.pdf
    • https://static.usrfiles.com/ugd/e2b09b_e89b1852ad314cd181cbfa804110cac1.pdf
    • https://static.usrfiles.com/ugd/b8c837_15d5a2bcce5648acb1eb6306d6485cc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c10706f4274681a2791097c196dca5.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_off00005bca.bin
e98f181c969bc935c345b73e1a25fa393e9a9e3851059082d77973542a04a469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCA 5340 bytes
font_01_sfnt_off00006de2.bin
817eb9c40632c01151e9c5ca377e2526f7f4c2ad026d9acd479a89697ceb65bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE2 10448 bytes

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