Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79bc738618cadab…

MALICIOUS

PDF

45.8 KB Created: 2020-10-18 02:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1fc9875863f810af04a9b03a21d9530c SHA-1: cc2213ef118158d143f1b118d5266930cf8e0d92 SHA-256: a79bc738618cadab747196b77119521fc651ebd1a2ece303562b39de9bc609ee
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://ttraff.link/123?keyword=logitech+c920+setup+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f89370e4f25a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f89d5406e218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f8b606983133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f88b13bd98cf.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/1/0430/2284/4067/files/vuvanibijozagobimamefako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7305/1042/files/57545215613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/3883418899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2f2883-0b57-4e75-a03a-ce0aa2d1a14f/gimiguradojomudesig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bffa37-7822-46b6-9c58-756aa73e08bb/birabudemunavedabavaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da71cf52-9bee-49f5-80ca-7a44c7e5d351/psychodynamic_psychiatry_in_clinical_practice_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5753142-a673-455c-b775-3401455c776d/27336138873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1011f3-42c7-4307-aac6-76207866549a/4772040480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31d4ca5-a76e-44cb-a0ec-fe7e694e56ac/fezibedodugusapolimeloja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e5cc8b-78f2-4dd8-83a1-dd70b02cc73a/sadexubenufonajuvuzuxafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47dbf5f1-f9b2-44e0-8df2-79c56e0b5763/taraxejoparevuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a319947d-9d81-4fdd-9b9d-54735741e770/jopefudatanerawexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aab2421-193e-4794-81db-6f89622d1c89/66135647711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a5598f-a432-4c57-94e4-5fc58f0c93b4/antigone_parados_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bce67b-6802-4d66-9057-4efde7d82b0a/viwawetisul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ae05d2-6abd-42c7-ad9e-bc63d8014823/92050438511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd6497d-4945-48f8-a380-c4ee127a7330/29780803727.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_off0000743a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743A 5368 bytes
SHA-256: 3f9349bdd4ecf8419223811e6e89245afb91b52fcb8140c6a8fbd8b0895e0500
font_01_sfnt_off00008687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8687 10512 bytes
SHA-256: ea0b76b58c492c0dc12c047cdcbacba6950204f04e09673fc21b0ae443e32331