Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2592e2b30235cd9…

MALICIOUS

PDF

44.3 KB Created: 2020-10-27 16:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c21151d9196bc5a5b16469b4f6102f0e SHA-1: 173fa0dc2bf41dae56e218bfd7b904c9f02ddb9f SHA-256: b2592e2b30235cd9d266163206ab5961f72893af09f898e9155d886c31f4a98e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?keyword=psionic+prestige+classes+3.5'. The document body also contains this URL, suggesting it is the primary malicious component. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a likely attempt to lure the user to a harmful site.

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.
  • 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://cctraff.ru/strik?keyword=psionic+prestige+classes+3.5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5f953c96ae104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f96c878aedfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f8aacf0e47ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f9608b29c588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5f93d0139e732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f903b0017111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f8d091109b61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/appropriate_technology_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/livasomifonanolawama.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/selozazuzunuvux.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/abbyy_transformer_vs_finereader.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/solving_linear_equations_graphically_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689cfeb9-7f0d-4dad-99c3-3bee8192ee69/fumenisewinanasoxikev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8acef755-64c5-43f7-b7e6-3b201ade8a90/43392317559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d64436-c7d1-495e-ad22-a35bef558c24/34136807963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9529/2059/files/91335568250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/buku_hukum_pidana_internasional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6978/7300/files/mobile_phone_tracking_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8646/2106/files/bidujupilafut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8463/6320/files/lupuvikuzilamunuzewonox.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 5424 bytes
SHA-256: 42539aff483cd9dc1faf779cdc4b4eda65335a61b24ced4c9592cff682cc9228
font_01_sfnt_off00007eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEE 11132 bytes
SHA-256: 6482055da485e1ab5a3cff13b4ea5ae2bf2d2e18a2a47bdde70b0994ed6f8341

Open this report in the interactive analyzer, or submit your own file for analysis.