Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb163f124a1b054e…

MALICIOUS

PDF

48.2 KB Created: 2020-08-31 13:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58d840c49efe2a26cfb3b1e9ebe96c3a SHA-1: 381b196cf6b95efdbc08e11d70cbdb70ffbad931 SHA-256: eb163f124a1b054e742fb8abd75d32b3de260a8a98641f84356e95f4ae2c810d
120 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous embedded URLs pointing to external content. One of these URLs, 'https://ttraff.ru/wix?keyword=witcher+3+hanna+aus+den+w%25C3%25A4ldern', is identified as a malicious redirector. The document body, though heavily garbled, appears to contain the same lure text as the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly legitimate-looking links.

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.ru/wix?keyword=witcher+3+hanna+aus+den+w%25C3%25A4ldern
    • https://static.usrfiles.com/ugd/ae059d_fe3dca2b69ff4296bcbbd3992bd5f089.pdf
    • https://static.usrfiles.com/ugd/4d6844_8a159ba7545b4c16ac99c4ca24915760.pdf
    • https://static.usrfiles.com/ugd/64d889_003af670efd14d65a326ce8073ea76ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_54acd1b4359e40bab030e4b644c34145.pdf
    • https://static.usrfiles.com/ugd/d1c05f_67cdaa00e8504193bb5e0f74993fc3f4.pdf
    • https://static.usrfiles.com/ugd/22739b_43a6571c9e4146eda20963de9a097eb7.pdf
    • https://static.usrfiles.com/ugd/7c3584_b5fdf376fc1641ee9727f6370713a878.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_6beb5708b6af4496b07a3639d72c0d33.pdf
    • https://static.usrfiles.com/ugd/824332_3737ba95647c4146890214c55d6245ad.pdf
    • https://static.usrfiles.com/ugd/173616_59e2592e8e1b4e1e83dbab034ce6ff86.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/poxatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/44726521853.pdf
    • https://static.usrfiles.com/ugd/b4609a_9036a47f93af4a909f4eecdf02247c04.pdf
    • https://static.usrfiles.com/ugd/be19e1_dc1ccbc27b59423fa655c2809a01ba26.pdf
    • https://static.usrfiles.com/ugd/b8c837_27eceed8fa744e81b2b2206a930b00ed.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_off000079f4.bin
b70ea9ae694a2dd5b3a8bda032747678fbeeabafbcb58581b3cb70757f38af0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F4 5532 bytes
font_01_sfnt_off00008c42.bin
f315d13a627e9a654e658ee866c27a9a200ed605b530357ffd4c4fea2677f061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C42 11552 bytes

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