Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df1314a42a673e8…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 14:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443d758937831f09981a28db67ebf328 SHA-1: 12813a1b6133743ad60983335a068723d4fb43d7 SHA-256: 2df1314a42a673e81edfd37d6ee775207df9726be9b34ea85546be497e32522b
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, many of which point to external PDF files hosted on static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic, suggesting a lure related to medical information.

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=most+serious+side+effect+of+metformin
    • https://static.usrfiles.com/ugd/685707_2575891b7f6e43508be25f2fc42dc574.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd83b711650c46d0ace2eb252c52e830.pdf
    • https://static.usrfiles.com/ugd/b8c837_9606e8de32fc4678b6a6a434a3988853.pdf
    • https://static.usrfiles.com/ugd/7598fa_9cdeccdc7d9b478ea3dd69841a85b7ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cc6f02fb8b14d88ac3c5a7bb30b2a08.pdf
    • https://static.usrfiles.com/ugd/34ec99_0d35e12f3606405186155025c0b7f9ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8c2e267e4b74361af773f31ab0b98db.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/lajebip.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/38705923077.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/fibivupowuzuduve.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/brunnen_bohren_anleitung.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/basaluki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/bevezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/tinirovorivulabudor.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_off000062d2.bin
14c953f2a393350e813f475130db1a8217d7e29cdbb856645f1070442caa6341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 4932 bytes
font_01_sfnt_off00007392.bin
74bed0e217623c327f361dbb76d0552ea008f46e3e63fc18c08cf9fd9a00371e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7392 10156 bytes

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