Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d73b187662f2a1…

MALICIOUS

PDF

38.4 KB Created: 2020-10-25 21:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 911652eb2c1f888e54efabd9c0a82d2f SHA-1: 9a80aa59d29d68769158ac1b72534aa82ebb35ba SHA-256: c4d73b187662f2a1fb125b8a0be49a055ab3d15a5263d10a87f278e4a58fb4ba
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/strik?keyword=kerbal+environmental+visual+enhancements, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL strongly suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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://gettraff.ru/strik?keyword=kerbal+environmental+visual+enhancements
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/vumakezoletuga.pdf
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/kinifipi.pdf
    • https://tumovapexawezan.weebly.com/uploads/1/3/1/3/131398362/6beb8d8a2c3543.pdf
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/9ea23171.pdf
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/c16cec0426183.pdf
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f8c971cc6c2c.pdf
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f8edf571d96e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3d7c9895-ce2b-460f-99ff-2d9b68755756/11541478526.pdf
    • https://uploads.strikinglycdn.com/files/169d47d2-ec62-4e2a-a933-2447ed835607/janozepibofex.pdf
    • https://uploads.strikinglycdn.com/files/e65f026f-5492-408c-9b1e-5fbce3c39842/78205071605.pdf
    • https://s3.amazonaws.com/zetare/53843561397.pdf
    • https://s3.amazonaws.com/memul/gegopu.pdf
    • https://s3.amazonaws.com/turip/livro_alonso_e_finn.pdf
    • https://s3.amazonaws.com/fejatepudopito/journal_atherosclerosis.pdf
    • https://uploads.strikinglycdn.com/files/6e8652fc-c736-4aca-8e83-f952993afea1/30563481914.pdf
    • https://uploads.strikinglycdn.com/files/0baf222f-fc64-4835-8dce-70d864ce6a52/zilegesinososami.pdf
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/10056666141.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8158/files/boketugupipo.pdf
    • https://cdn.shopify.com/s/files/1/0484/4299/8938/files/11762748892.pdf
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/2_pints_to_ounces.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_off00005784.bin
61327048a050d38dc73e64ccaa8da51e0ba77244c1e7e25455a9fec89ed6f7b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5784 5208 bytes
font_01_sfnt_off00006910.bin
6d0df7a722a5872051bb3fc1ce3091d06fc8b6fb1766ba99954f984cc57ecc9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 10296 bytes

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