Malicious PDF — malware analysis report

Static analysis result for SHA-256 779e9d5c5d8fa082…

MALICIOUS

PDF

43.7 KB Created: 2020-10-25 09:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fbc3274193d1a0690b8c92a737ed0e66 SHA-1: 793277a96da79919b9e8aefa50d5a30315a1f97b SHA-256: 779e9d5c5d8fa0829ac8d117dd47344588abbb54b8f6ea2cc729d7b82d8d640f
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=wheel+of+life+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f9395928566e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8708cd7e849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f9440e48e6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f8c70ecdf563.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/3905791.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/9867956.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006d9e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006d9e.bin)
    • https://uploads.strikinglycdn.com/files/28060e99-7584-4d22-9d4a-2e6a94eccfd0/el_mito_del_emprendedor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06545b20-668f-4861-806c-fe24c0c659d0/27569818696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d538985f-4f61-47fb-b3a9-1d08f7be0c35/xutizotegavaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59c378a-34dd-4b5f-a5b0-29c29aad6b39/jixasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/55850873365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3936/2719/files/organometallic_chemistry_by_yamamoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6528b6-42e8-4974-8db6-a050dce98e38/o_conhecimento_do_santo_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11002af-339e-488e-801b-e6227070f77d/73327755698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ead77dd-5b47-498f-89d7-8a8154340577/46290610159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd235423-71c3-4307-b14c-5862f9dfc6e8/lusidule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/405153f1-a2a0-4213-9169-559c8be6d6e0/zikobolud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e41785-540d-4ba7-a9f9-9e2ce8e22635/gapubavorofovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b53ff22-e2a7-40e5-857e-7e55f8c6cab1/54377014846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c376bb9-b6de-4b30-85dd-20abbd66799f/faa_form_337_instructions.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 extracted file (font_00_sfnt_off00006d9e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 4860 bytes
SHA-256: e0a6fbdd7e26eaf42d7337047582d41467607552c3ed67c801a6b8bf28b9740e
font_01_sfnt_off00007e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E34 10244 bytes
SHA-256: 097a1be56de1d4a5ad641072e012239d920d7b89fab20ff4f15642b147ef2582