Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef410e18372fd33d…

MALICIOUS

PDF

44.0 KB Created: 2020-08-29 12:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4503e230e9f18677e228584b0f1744 SHA-1: 2119899805b919ea09ccb0027ebfc3d1074bdc26 SHA-256: ef410e18372fd33d83588e3f4a4604fa6161de9fc2d29511aaddb779d5fffdd3
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded links, 'https://ttraff.ru/wix?keyword=que+es+la+rieb+pdf', is known to point to malicious redirector infrastructure. The document body itself is largely unreadable, but the presence of numerous links suggests an attempt to lure the user to external, potentially harmful, sites.

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=que+es+la+rieb+pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/46570594623.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/wamebal.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/xosudixekakozusudifi.pdf
    • https://static.usrfiles.com/ugd/b8c837_28db6fce22e7475f990c20a784418b81.pdf
    • https://static.usrfiles.com/ugd/b8c837_92074b9a757c491eba549f6adecaa1e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_15a63e2dcabf44b3bbb9404c704151f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4f23902e277478ba0bae8527c0f597e.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf754ad8e78246df8fccd1dcdfbb113d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f937331da51648f0a8d23126ba60b336.pdf
    • https://static.usrfiles.com/ugd/b8c837_57c36b2ae6254bde9ed153e4f250bf29.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a36348727c4e4a8f130218f187521d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffcab909836f4f569240b4f477341320.pdf
    • https://static.usrfiles.com/ugd/b8c837_557587f7006f40a0a4d94759a416b77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b508ac2e86d046f5b0078f3fef4526a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ab783d66b624c129b02028b7d30d5db.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f5964cf47640e494df78c33968e996.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_off00006bf0.bin
2cc606279202879d5d225c527c399e9225603fe17edaff8c2447687cd8cfb744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF0 5236 bytes
font_01_sfnt_off00007dc1.bin
a8804dc479c20e85e0dbb69b56872e2d1b8b03d9592d2888ac50f817c56af656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC1 10980 bytes

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