Malicious PDF — malware analysis report

Static analysis result for SHA-256 687cda756452a471…

MALICIOUS

PDF

39.0 KB Created: 2020-10-14 07:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cdece9355bce3d41c5766a2d381f08ae SHA-1: 2d5340dece09303eeba2ec346699d7f19839363c SHA-256: 687cda756452a471c40f764f8cdb27022401b7dddac41b17bcc0013029ca1e17
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=matlab+tutorial+for+digital+image+processing+pdf In PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/dulimowopupasubawoduzuwet.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/4878369512.pdfIn PDF document text
    • https://site-1042731.mozfiles.com/files/1042731/20700047239.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.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/9751d60f-3456-45c4-a94a-603d9d6fbc6c/58165395077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e277815-f312-40cc-b8e7-a05c4aaf3c8c/wawigalorurerekuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6d650d-4370-43c5-ad41-7015e9e34e88/17570574476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6580168a-65e1-4eb0-bfb3-0f3230c9ee6b/94052086147.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_off000059a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 5620 bytes
SHA-256: c360ebd7aa18206336685f2b70c42529fe5f1e0fe4323b1ad6fbc794d3014cf4
font_01_sfnt_off00006ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA4 10140 bytes
SHA-256: 1e1fd1f4bd5a4fde585f648bd4c863f8836db7702eaab6d7ff257a7f6333803c