Malicious PDF — malware analysis report

Static analysis result for SHA-256 5021c3ea634eaab4…

MALICIOUS

PDF

65.2 KB Created: 2020-08-19 23:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06bd354001a71f38976df25b61e9b5d5 SHA-1: 68b4629abf6280e1837c93b3bacee883614cd8cd SHA-256: 5021c3ea634eaab4b026fd14bcfc69db1a86e364eab19be7e0d905efa678aed4
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=dawn+of+titans+guide', suggesting a lure related to the game 'Dawn of Titans'. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=dawn+of+titans+guide
    • http://files.zenfreshcleaning.com/uploads/1/3/2/7/132741429/bogukivanakusuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/pekeduminejebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/39841922368.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/kubipag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/sezozemomatow.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5830/files/planos_arquitectonicos_de_casas_residenciales.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/15579616261.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/benirarofurotobasosetev.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/capablanca_chess_fundamentals_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/airbnb_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/fasofubotufazazonoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/23465424049.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_off0000b557.bin
eedfc74ff5d54f08740eb814a56c856d5c025a333744e9665d65a725fca14533		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB557 4920 bytes
font_01_sfnt_off0000c63a.bin
654cda2073a5b13338952e3009ba8ab0b6a2b636e53f452657409941ed025b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC63A 10704 bytes
font_02_sfnt_off0000ea87.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 4324 bytes

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