Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdfd33c9ce3575d…

MALICIOUS

PDF

48.4 KB Created: 2020-11-02 07:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2bac074c3f3553a054891f2fb844b7c3 SHA-1: c09f22642af0f082efe15e6164a0f65bc4f7989e SHA-256: ecdfd33c9ce3575d3951b70a6d8b74b8a656675ab0d147a74861bda3cf317f01
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://cctraff.ru/123?keyword=god+s+way+to+ultimate+health+free+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_5f9f81622a34c.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/751e7834-9e8d-479c-86f1-5b4a6715cc92/vitetalokizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec176dbb-9bc8-40ec-9ab7-d3a9b4330605/7319655401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6090/1526/files/75336626219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff01c4bd-8977-4bc8-9ce7-dffb6c5fd035/trigonometria_ejercicios_dificiles.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/thinking_maps_templates_google_slides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73cc571c-9616-4024-a50d-4c2b91d7a02f/nisukize.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/kozabolimafetujiguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21c573d-4256-40f8-bd7b-9b2629467209/fudemanejasawoxalawebos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d570e503-67d5-40ac-96fd-722014126d5b/elvenar_tournament_rewards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e01139-ea2d-43b9-8e7a-237b80bfa8a1/xegoguwajixabawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51249102-a065-4911-98a5-184bd5226161/69601829634.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_off00007bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 5504 bytes
SHA-256: c857a53a003f879bb7f020671dca4d2c34a4f9ff98ab5ca014c33a76b16a6daa
font_01_sfnt_off00008e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6A 11376 bytes
SHA-256: b698e05c26aa1544c01c549f866b7b9d2328f390d514bebcee2aaa41d10dae7d