Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcb02bc3077a403…

MALICIOUS

PDF

41.1 KB Created: 2020-10-13 03:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c1b00e7f0a29d99947c7652f247159c SHA-1: 4ae06401a8592771614546ec4a5def8181c29943 SHA-256: ddcb02bc3077a403f1733454f988fca8f4bd3d98e197cae08779f1646e12a4db
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=pajama+pants+free+pattern+pdf In PDF document text
    • http://files.justsayin.ca/uploads/1/3/1/4/131406687/pavewelukejevilibas.pdfIn PDF document text
    • http://files.goldencrossagservices.com/uploads/1/3/2/7/132740723/fiwizixek.pdfIn PDF document text
    • http://logolumam.jamieblynn.com/uploads/1/3/1/6/131637027/papub-keninewumifo.pdfIn PDF document text
    • http://fekijizor.plantinggems.co.uk/uploads/1/3/0/8/130874038/xosapikenoliw_sufavezusa.pdfIn PDF document text
    • http://zuzalev.proudfoxgallery.com/uploads/1/3/1/4/131483154/8803407.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/befiwutobugabugawunifip.pdfIn PDF document text
    • https://site-1039226.mozfiles.com/files/1039226/20293884830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8339/1910/files/kipp_character_report_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5289/9231/files/passing_by_langston_hughes_theme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8683/0496/files/contingencies_of_reinforcement_rbt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7382/9032/files/wenexosodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/gopevojudona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77030244-1cfd-4aea-b0fd-144d01907c0b/73145625067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2608568c-3fb0-43e2-b8ff-914458072bf5/5947330605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eeaa68f-66ca-4cfb-ac27-ddb05f8c8949/88963786835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427522a3-e26e-4ff6-85a2-2ffe4fa7d583/45155615128.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_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 5232 bytes
SHA-256: e4f2222251fda31996b79cb9c6b0fcdc2226ad9e8690d16a56ed57fd4b8c3bec
font_01_sfnt_off000074b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B1 10312 bytes
SHA-256: a15908e8e80d87a0deb13a70d9ad6040d8b0c2ad6427dc911f54585df94d9028

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