Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1be838da819b754…

MALICIOUS

PDF

54.5 KB Created: 2020-08-31 10:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5772cabc65359a2cd25bd8fa5a6aa651 SHA-1: b44ea5e1fd14d7f0019ac57defa675601c5d4d33 SHA-256: c1be838da819b7542957869fb5ff797c40c9b89066e808a8f816d4417246ccb1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=indiana+drivers+license+test+study+guide'. This URL is presented within the document body, disguised as a study guide. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is the most critical IOC.

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=indiana+drivers+license+test+study+guide
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/70171958753.pdf
    • https://cdn.shopify.com/s/files/1/0440/7132/1752/files/80641254532.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/love_yourself_answer_album_l_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/84828122280.pdf
    • https://cdn.shopify.com/s/files/1/0434/0426/3580/files/48088866553.pdf
    • https://static.usrfiles.com/ugd/b8c837_58cefc3aef284e358fb09f3a1017fe3c.pdf
    • https://static.usrfiles.com/ugd/33ab24_6ab4f5c9f72746c8b23e2646d46fe111.pdf
    • https://static.usrfiles.com/ugd/eb4c03_dd15c4e102aa4fdc88f03f574d4bff6d.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/tuket.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/pokemon_go_available_alola_forms.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/mojegerutejukav.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/puffin_browser_pro_app_ios.pdf
    • https://static.usrfiles.com/ugd/50c35f_273503691496489a830d55599ea934c8.pdf
    • https://static.usrfiles.com/ugd/b13fd1_498875105bcf4a0b9068977b48161907.pdf
    • https://static.usrfiles.com/ugd/374ce0_0415baf0718d4876a71cd353cc504699.pdf
    • https://static.usrfiles.com/ugd/289c5e_e6a33e8fed5b43e4845915bb531f502a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6694744333924d179f20ebd4164a7612.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_off00009563.bin
2c90d010ce50b4588383e6b11187d28d0d02d2b24945d307b6164fe66c01e145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9563 5204 bytes
font_01_sfnt_off0000a729.bin
5ba2cbe4069dbd93ebd9b4bd2004c5702ec96ce912ba2469504ef01f6add4f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA729 11212 bytes

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