Malicious PDF — malware analysis report

Static analysis result for SHA-256 971bd8e69ab7545b…

MALICIOUS

PDF

36.4 KB Created: 2020-08-30 10:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916065c3b7e51f2994d34a0f73c47a90 SHA-1: 889c3ce4aa7a72e7b2bed0c7c610f5023749c2a6 SHA-256: 971bd8e69ab7545b3083bde5a8896a38db15a82286ffc0683a6931d95eef23e4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links, with the primary one being a redirector. The document body, though heavily corrupted, contains the URL https://ttraff.ru/wix?keyword=i%2527m+literally+shaking, which is flagged as malicious. The presence of numerous Shopify links suggests an attempt to blend malicious content with seemingly benign ones.

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=i%2527m+literally+shaking
    • https://cdn.shopify.com/s/files/1/0468/1236/4954/files/8619512984.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/setetolujim.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/dungeon_twister_card_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/beps_action_plan_2.pdf
    • https://static.usrfiles.com/ugd/88a84f_684737de319d43ffb3a97754df865ca2.pdf
    • https://static.usrfiles.com/ugd/b8c837_920ece2f56c643e299f179c7d6249eb3.pdf
    • https://static.usrfiles.com/ugd/455f95_a896237ab43149258e258fbb7eb4bda2.pdf
    • https://static.usrfiles.com/ugd/0511f5_f84c42dff9fd4eb190ba3a70ea5ea245.pdf
    • https://static.usrfiles.com/ugd/10e3af_7803eeaa70f5470b935681b6b1200cbe.pdf
    • https://cdn.shopify.com/s/files/1/0465/1329/1422/files/tuxera_ntfs_could_not_mount.pdf
    • https://cdn.shopify.com/s/files/1/0439/9444/8030/files/13089632969.pdf
    • https://cdn.shopify.com/s/files/1/0435/5869/9159/files/8113699204.pdf
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/vakofulowujizowarokud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/xuzefu.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_off00004fd4.bin
8ebc40d64cfb17e8d18acc1c894ca73768099254d0417116b29e04572b53e547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD4 5236 bytes
font_01_sfnt_off00006188.bin
5aa90ead1280fac0723b1ed4fcd8718859111256e6a143583c2d57a8c7bb9456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6188 10404 bytes

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