Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcee7bd839060374…

MALICIOUS

PDF

68.1 KB Created: 2020-10-21 21:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 74d1d2ae7e3ac6368d33063b7af875d2 SHA-1: 04dd8978093005ee1bb67c26ae5f9ffd93c5fcec SHA-256: dcee7bd839060374c61971a88bcc5c016aa8224bc403faaa47e94587d4921d6b
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://ggtraff.ru/123?keyword=python+programming+practical+questions+and+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870baa0aac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f8947508f616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8c72fec2d41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f89730721d2a.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/5123164.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/b522711fa3441.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/bekabasuref-rexokaxu.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/4a6dac.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/tokep.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/2494499.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/bugujo.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/dc3e4d77ec.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/ruxozukozuvazu.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/xolodub.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/85edd96af.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.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/1/0435/5601/2191/files/1524734855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/1469185056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5505/3472/files/descargar_pixlr_express_para_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca07e72-dbda-442c-be6d-d610e39d927c/muzan_kimetsu_no_yaiba.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_off0000bd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9F 5892 bytes
SHA-256: aa609d155bd179be8c543ce1745af0910fff2a8a2a177003d25dd2c655f2448f
font_01_sfnt_off0000d185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD185 15436 bytes
SHA-256: 443f3662454c36f3d330325c6201db1209a86033f97adbaba87b8602af58de5c

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