Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e63ca53d07c408…

MALICIOUS

PDF

54.4 KB Created: 2020-08-29 16:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94cf407aa6690b937380f7813139a476 SHA-1: ad66f4f46f8da0f8ef6ffd45b198918c54984b43 SHA-256: 23e63ca53d07c4080ca427a08ab233fb810d53d76df7e362e56ddd87733922b1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a datasheet title and a URL that matches the malicious redirector. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, suggests a link farm designed to obscure the ultimate malicious destination.

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.link/wix?keyword=firepower+1120+datasheet
    • https://static.usrfiles.com/ugd/b8c837_fa95854cc88841c696f29247252cd6fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc39c6ddc732468aa0b64909ba3bb54a.pdf
    • https://static.usrfiles.com/ugd/accd1f_14090c1433ff4c2fa4fa1b9506295dad.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc05465ae0a4ac48cead0826860b0c9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7976/files/24852750267.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/iphigenia_in_tauris_euripides.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/kunekikibavubafef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/kovafisewedakewafif.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/benavotejatefafaw.pdf
    • https://static.usrfiles.com/ugd/9219f8_3b463407ee3048f08b33160924183ccc.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa49c5deaa734a748ffa946b30077b91.pdf
    • https://static.usrfiles.com/ugd/eb4c03_c3aaf055e98d4ccea929835c5e28f63c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7649132ef5904122b1299c1e52f472a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_22419d5e27a1413a9806da59d1aaeb76.pdf
    • https://static.usrfiles.com/ugd/b8c837_0efa7f55304744ce94d5d75ceacda733.pdf
    • https://static.usrfiles.com/ugd/913720_51acf251fc2f431588e48e25e8630277.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_off00008614.bin
6416c27b25fc72969b98a4b173736b549d4ffa270202bb94a22c23da0acafc47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8614 5388 bytes
font_01_sfnt_off00009872.bin
50f284f00bd989800fb6108d41789b277513f0fd4920a9c9c3600431e9cbc81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9872 16284 bytes

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