Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00bbd92debed1b0…

MALICIOUS

PDF

37.9 KB Created: 2020-10-17 21:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a6b1b1e00abfffed65630b1bba829e45 SHA-1: 1fd220cc447be13893062512f09aa93621cca17b SHA-256: a00bbd92debed1b01e49721deded7eb3adcba4d5c5525402d40390d840e8d667
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=cultura+general+para+dummies+pdf+descargar+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f8a944e334a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8994e573d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8905c4797cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8a678d84444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8759a1c2f3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f87300e82600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8b2058a713a.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/1/0432/0120/0289/files/60173125653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2478/7867/files/pufutadobivikake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1477/3672/files/gavusegugox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41371ed4-f9f1-4fa2-8014-2cf7791a664b/xikitumakulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f9e613-5c2d-42c9-ae5d-57b847b07563/livevajadaferefebilupog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347e48ff-3556-4738-b303-d7b7bbec4dd6/pisitodosekelewobebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1203a824-d6ae-4cbd-84d2-5315759a5e27/raxewubake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fafbb2d-9a2e-4c9b-8a9d-b848074134b5/95199613599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2cfd80-40e9-4bc7-8267-27f0d8d0b6fb/dadoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16180dd-bb27-4e6a-97d1-25d352f4aa33/sanelovobifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c3b96c-48f3-4ac9-9074-595f3c943f0b/38871650774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fe565e-4aa2-4d32-9032-2b6ed5056c41/the_wrath_of_cain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4364d0e6-00a7-4df7-8c8a-c42c43ab86b8/60036141177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2fedb7-de98-4dd5-85f0-06ca75f51d3f/52658443449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa58157-36f3-491e-8192-4450700f09b5/5706763569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4bbbfd2-71f2-4cc9-9cad-5d0550b24fbb/taduzafezuzamaruxos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3475d3f-23c8-4276-b81c-1b0d86952880/lidovufunixag.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_off000054e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E0 5380 bytes
SHA-256: c3b5d8c49d202cd9b326c1ad0671faf1f4251b471c748fe7c3d3016a9563c7a3
font_01_sfnt_off0000670f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 10160 bytes
SHA-256: c7854af9b866971cddab5323dd7a55e18a10fce39f8e7a801108c4ec13f48497