Malicious PDF — malware analysis report

Static analysis result for SHA-256 4899ac9db72c6606…

MALICIOUS

PDF

363.2 KB Created: 2020-11-04 01:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 704bd652b775ff1a3c7974bd5ddeefe8 SHA-1: 3d9f7ee103a503c961cb7c7d24b1d7ce5e362c79 SHA-256: 4899ac9db72c6606e20f8ac7e005065d84d6344ea378f22b40cc643c677deeac
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/strik?keyword=rivertown+movie+theater+oxon+hill+md, is identified as a primary indicator of malicious activity. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=rivertown+movie+theater+oxon+hill+md In PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/810fbf551290d.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/winin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bae3a6-13c0-47f8-a9b2-abc8765c49cd/90594013359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1b84d4-8915-487e-b4d4-999d87d1618d/wubalugijevopo.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/suffixes_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/afterlife_the_strange_science_of_decay_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b41d6b-a2e4-4ea5-8a56-3ae173fb76a2/12082883098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c2c4a5-3641-4961-875b-41e59c8be8ff/17008543476.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/egunner_how_to_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f0fcdc-6d49-4301-a427-9cf25970649a/8553343268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42fbd9c-f396-438f-845e-143b01559fdc/22037973487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6127424-4517-41ac-8d7b-d2a12cf2cf52/6944019870.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/xazujiniporime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a11381-165b-41cf-a16b-7940ddc07f5e/the_virtual_compound_microscope_worksheet_answer_key.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_off00055a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55A66 5112 bytes
SHA-256: 823eb08091432c4d618ab608975d0fd32e5c465c4e6715e779b43575a9d97e70
font_01_sfnt_off00056bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56BBA 14628 bytes
SHA-256: f2a0e7197e189769435ad00110313aa15dfbba9d78371f55766bde2c4b254a91

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