Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ec17f2aec909fa…

MALICIOUS

PDF

33.1 KB Created: 2020-08-30 15:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6331469db1b08530f0f313efdb0755c7 SHA-1: 1a294835c9289b6cfa292c78edea36a1a8159d37 SHA-256: c3ec17f2aec909fab99ce7809196aa5115b43dac852bbe2f8e68ee6b4d9550f8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=masterbuilt+turkey+fryer+and+seafood'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0428/6241/1942/files/gekumidapokukaxolade.pdf'. The document body, though heavily obfuscated, also contains these URLs, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=masterbuilt+turkey+fryer+and+seafood
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/gekumidapokukaxolade.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/adelphoe_terenzio_latino.pdf
    • https://cdn.shopify.com/s/files/1/0435/6371/2671/files/gejoxikobuzakelalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/6018078035.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/20066286259.pdf
    • https://cdn.shopify.com/s/files/1/0448/9465/0535/files/18016345769.pdf
    • https://cdn.shopify.com/s/files/1/0464/0725/4171/files/grocery_shopping_list.pdf
    • https://static.usrfiles.com/ugd/d2751c_164544551bd148d19c642ae95569adca.pdf
    • https://static.usrfiles.com/ugd/b8c837_d67d8056b5154b03857102a7e4b00ac6.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/91847661340.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/photonic_band_gap.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/lezesixuwadup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/aprendizaje_social_autores.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_off000043ce.bin
6908840575a536a3e9489e9620a79f1dd4344f7bc4d51d742bf53da1d4e0d535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43CE 5212 bytes
font_01_sfnt_off00005599.bin
7c0433f62189b96cc8485c055065ffe0a022d4b1279e19826f9c828a0743621f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5599 10016 bytes

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