Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a4ffcbee80df45…

MALICIOUS

PDF

34.8 KB Created: 2020-10-08 07:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d6d2721280758717edb590d83e8f7718 SHA-1: ec16dd87775694017a97d17e0acc7b13e331fb6c SHA-256: 60a4ffcbee80df456539fc657d939b6b27f1c83419a7aa223276bf895b5938d6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?keyword=walgreens+cool+mist+humidifier+manua In PDF document text
    • http://nobovulo.rickpowelldesign.com/uploads/1/3/1/1/131164246/69a10f0db943.pdfIn PDF document text
    • http://files.rosepetalscafe.com/uploads/1/3/1/3/131384663/wiziduxujate.pdfIn PDF document text
    • http://files.rejuvdayspashop.com/uploads/1/3/0/7/130740625/5097da6e35f1.pdfIn PDF document text
    • https://site-1039135.mozfiles.com/files/1039135/dumawawulixoje.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/jafiwuzulafadiwisifopow.pdfIn PDF document text
    • https://site-1039341.mozfiles.com/files/1039341/bulifezetovefi.pdfIn PDF document text
    • https://site-1039698.mozfiles.com/files/1039698/sunefanijewibumez.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/2ad8b480-1d8d-4948-8fe3-2bf6ccf62423/75274158505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8e5b6a-6c2e-4383-8ad4-8578f76e64ae/67625651820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480fc5a4-741a-4531-852e-95556b1a4f6b/vezakafefowaxonitososud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48bdfaed-72ef-422b-9014-8922f87001ad/51702762988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c195f320-f81e-4427-bf12-595d3a1661a2/12651309371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb91e25b-84c7-4d44-bb12-831b9718e920/2926307077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177bd362-3370-40b0-913e-720e2dfc4159/74728376018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368b41e7-5287-4740-8e36-0b1404dc0434/41230419745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff762271-2bcf-4099-95d3-3e831fb9cf8b/67519582836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b0f52e-e66e-40e2-b94f-cd77562af362/kizisififomixidego.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_off000049df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DF 5448 bytes
SHA-256: 6f0041112433156de4b3423e27d2f68f85666ee69cb00832e28e8b2ecd3d67de
font_01_sfnt_off00005c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42 9924 bytes
SHA-256: 85c06ba70a6dc41e16d1132f1dbb02ee16d20b4e810b43b8e6332e94b7e15a55

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