Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d91371ce3e5ca1f…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 06:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d48cc726181311b62f0f911cc81911b SHA-1: a7cf6d2b08d235e99c01f6de107b9470a0d8c7c2 SHA-256: 2d91371ce3e5ca1fce387e2dc54736ac2b8fd7eb4590a95c72bb2f7703b3a74c
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, identified as a PDF SEO link farm. One of these links, https://ttraff.ru/wix?keyword=concepto+de+empresa+mercantil, is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users into clicking malicious links, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated.

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=concepto+de+empresa+mercantil
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/gifod.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/call_id_spoofing_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/86378088461.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_033164b99c7b4aacb5ec1b167aa572bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_61264e2ac40943d98da7c60beab52542.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7811/files/54993123594.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/xidajet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/kifafekuravilesijazumuxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/5660/9957/files/jedalolanidikopemape.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6ade1eebc8242aba3474f90d177a413.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c369762975a41ddad84b8131cc23851.pdf
    • https://static.usrfiles.com/ugd/122077_f67240701cb34473b2f10c495e10edf4.pdf
    • https://static.usrfiles.com/ugd/e2c250_57f395e38cc7473496196bd9d31fb75f.pdf
    • https://static.usrfiles.com/ugd/b8c837_86313ea7cb184f0ea31e33c1249df491.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_off00007c24.bin
8bade6ace4997633e90dadececad790d5db107794ec539a6053d39ba9587f889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 5124 bytes
font_01_sfnt_off00008d6b.bin
6d9217dcee9330b69ac31d557e52d4d31ad4e60609da2a37217b4fa5b66ddc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6B 10628 bytes

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