Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7e5736ed3b8b8f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 06:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 692e911e0bf1f0f330ac76a8b1f0389b SHA-1: 52b498a145384c7d14002bed6f74399329ff18c2 SHA-256: 9f7e5736ed3b8b8fcf58f2c8fb0a5dad8e93bee9732ac8f4283b4b357cbedeeb
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=tcp+ip+sockets+in+c+pdf'. This indicates an attempt to direct users to a harmful site, likely for phishing or malware distribution. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of numerous other links, many to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility.

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=tcp+ip+sockets+in+c+pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/79997668910.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/tutixarawegoxivalof.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/56762256662.pdf
    • https://cdn.shopify.com/s/files/1/0447/8110/9405/files/libro_los_4_acuerdos_toltecas.pdf
    • https://static.usrfiles.com/ugd/a91264_8d870b4e28564423a25833c7678801e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_24693ea7847d4bafb96e0921e4ff8d9b.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/bijugigejamisem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/android_root_software_for_pc_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/3265/7568/files/music_video_sites_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0459/7265/2199/files/house_of_night_marked_audiobook.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/action_replay_pokemon.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/osrs_money_making_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/66218847380.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/38292232799.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058db.bin
9d75915f4d9aa2509e59cf1e7862fa9cb232931fafd7e4d385859e72cdfd2c53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DB 4612 bytes
font_01_sfnt_off00006899.bin
e9602aab7b12e39a468a6740e18e742826a77b682f72fc97b7c6b1540cad0c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 12820 bytes
font_02_sfnt_off0000915f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x915F 4324 bytes

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