Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9b7d3a81087d10…

MALICIOUS

PDF

45.1 KB Created: 2020-09-01 08:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed42cec0c899bb309b721fad199a2fe SHA-1: 1eacaa2e72cd146bb003b567f3d0c6a776bd3c55 SHA-256: 6a9b7d3a81087d100bfe56effec0bcd689001b00f49737182bc4e5f5c9ad5b88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a game guide. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or redirection attempt. The document body and embedded URLs reinforce this, pointing to the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=divine+divinity+2+party+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/66133513741.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/75567085880.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/36567109291.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/brute_force_wifi_password.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/action_replay_codes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7912/9501/files/rixidikonog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/15905432602.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/cambridge_igcse_economics_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0463/2395/7920/files/self_declaration_form_annexure_e1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rexalomofovuwazeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/racing_car_design_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0438/2549/6221/files/11331412304.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/rijowijapoviwiridewudur.pdf
    • https://cdn.shopify.com/s/files/1/0440/1732/0094/files/zujalujabaforuwute.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/dokelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/tipupapixazifipexek.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072e4.bin
de2f0f5b5467d710394b838814f9d580e0f7eca4326f3434c9c44369ea6087e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E4 5212 bytes
font_01_sfnt_off000084c2.bin
67a4d801341af375ed95e5e4565a0ff9674da1b567174aadb1ad6d5a3c0e669a
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 10256 bytes