Malicious PDF — malware analysis report

Static analysis result for SHA-256 a611294438d91aed…

MALICIOUS

PDF

49.5 KB Created: 2020-10-03 20:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4fd99f4123ac8d81165ac35bb7fe3840 SHA-1: f6c9a4b2bbac9984204a1f6aa9fd2e16738ff98a SHA-256: a611294438d91aed0e1c3159a3b9f45ee967c38b9c871fda1b31cd328f585ed0
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=the+babydust+method In PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/sujosoxekefiwigekudajime.pdfIn PDF document text
    • https://site-1036756.mozfiles.com/files/1036756/wexulelevemugumar.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/14917715530.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/28185943233.pdfIn PDF document text
    • http://files.northportcarpet.com/uploads/1/3/0/8/130874488/2953412.pdfIn PDF document text
    • http://files.assertion-evidence.com/uploads/1/3/2/6/132695643/50d15f5.pdfIn PDF document text
    • http://files.kelownanaturopathicdoctor.ca/uploads/1/3/0/7/130776001/vatifoka.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/73a535d5-39ca-43d2-9d95-103c35b1d803/mizupigasekafawewatibij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a3beb3-7048-4eea-a112-30eae368dadb/35356588911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165551f7-fe25-4633-8ebb-297a9b540f27/80874709366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde2383d-d918-46e7-842b-4c9c9ee7d1c6/notirerakuduxewusisaneri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0a7ab4-1bbc-49d7-9d4b-b7994588c132/daradowozofigeruvugun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6297/2582/files/87489758098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0978/8069/files/79707262833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9488/files/kumujuruwuwizilanakekogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5911/3884/files/td_auto_assurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1138/6787/files/fukojinoxogabeseweregajez.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_off000080e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E3 5128 bytes
SHA-256: dad01ca6c4cc00fa2a71a8f1d82189e425db4edef833fd8f18053fb124d24476
font_01_sfnt_off0000922f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 11624 bytes
SHA-256: 327cf88dcb1fb6582d5da5a0e4c3dea469768f5cc7ccfabeb1edd16a605b07d4

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