Malicious PDF — malware analysis report

Static analysis result for SHA-256 869a613907ba0b58…

MALICIOUS

PDF

35.5 KB Created: 2020-08-30 14:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05fc475c5ab7bb9b5b8b63958f15e9e6 SHA-1: 09aa0c3651b6d2a625488a7e46d7ec141cd58dfb SHA-256: 869a613907ba0b58263239977f2d38a0f90353a70f8c02d7ac534169f9d89bfc
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 likely used to distribute further malware or conduct phishing. The document body, though heavily obfuscated, contains the same URL and references a popular video game, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links further indicates a link farm or redirection scheme.

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=solution+yooka+laylee
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7508/3167/files/19897775748.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6834/files/today_eenadu_news_epaper_andhra_pradesh.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6585/files/xebazawagivubonivajimuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/zulupaneboluwomesi.pdf
    • https://static.usrfiles.com/ugd/b8c837_453b49a91bbe4ca78793cb8de7d4e7ab.pdf
    • https://static.usrfiles.com/ugd/a107db_5cbc4e702bac4cbb967515d54e87dae1.pdf
    • https://static.usrfiles.com/ugd/b91566_bea7c981cb1a44ca9aefdfb2fb6ace33.pdf
    • https://cdn.shopify.com/s/files/1/0430/0642/7289/files/40555712829.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/dedovunow.pdf
    • https://cdn.shopify.com/s/files/1/0464/7976/9768/files/30687962047.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/nutapovemujifavalofolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/internet_explorer_location_default.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_off00004fcd.bin
021afb8828d315c8cb79fb52d58110019865933049f72db113143d7d17834bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCD 4676 bytes
font_01_sfnt_off00005fc8.bin
191d8b4c080c07aa3c00da49ceb93e222376c8d99652d40a1f707726f640c193
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 9900 bytes