Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfbe79a5e2c0bfa…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 20:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950986f3945e645f66e11abc05a967e0 SHA-1: 06243e0ffaa4671e6be10f418b605170a56817d7 SHA-256: fcfbe79a5e2c0bfa23fcaa9cdd60926ee2066aaf0352d76b89d498014142f73a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.ru/wix?keyword=4.+08+selecciones+el+premio+nobel, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this malicious URL and other benign-looking Shopify URLs, suggesting a lure to a malicious site. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=4.+08+selecciones+el+premio+nobel
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/81443394535.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/nagotawar.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/44944780028.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1158/files/lileriworajuluduzabaw.pdf
    • https://static.usrfiles.com/ugd/b8c837_de3c9db0f874497da0122ed0da29be62.pdf
    • https://static.usrfiles.com/ugd/5926b4_06682d5844e242959c46e5bc843b0d62.pdf
    • https://static.usrfiles.com/ugd/b8c837_258a96fa30bd41219800a6511a5ec1bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8bd4134a00945f09210d802911cd271.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0045a5acf644ecd8e81c7dd61163492.pdf
    • https://static.usrfiles.com/ugd/a771bd_3d9ecafe8dc7420fb68bcdb8ab8cfd41.pdf
    • https://static.usrfiles.com/ugd/b8c837_e31ddc96d9e74001a29a6b804284a459.pdf
    • https://static.usrfiles.com/ugd/b8c837_9261417b23ee47ed882b883124e8146f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32663d164b94940a19c6eeb3fa24506.pdf
    • https://static.usrfiles.com/ugd/b8c837_f04ff70ac2c7404db8eb1046660cbc7d.pdf
    • https://static.usrfiles.com/ugd/353d00_af4ebd3294134a6a91625aee25d7f6ca.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_off000061cc.bin
029b0cb0724d09e395750b6a605a2e6cf380983efcc1623f7ef9b41fb0f37e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 5372 bytes
font_01_sfnt_off000073ea.bin
a882a61bfe6286183cd58d1a619270ebbf2e81058a5337ea5e33941c8398c730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 10724 bytes

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