Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e66c839ee5d60d…

MALICIOUS

PDF

43.6 KB Created: 2020-10-29 22:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 3bf905cc7cecedbc33dc2b03b47ee679 SHA-1: 778cc4013fcb461d9a75161f7b8fce0b2e065f0b SHA-256: d3e66c839ee5d60df4de85ea7d224fcaf4396faf2ae31e3c6388a4b78b064d25
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/wb?keyword=canadian%20accreditation%20standards%20for%20hospitals%20pdf In PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/tumidekugog_vefetuxitobi_munijugit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f961821a3a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87049f77f74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupuso/binary_search_algorithm_in_c.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/animal_alphabet_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/nios_class_12_sociology_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0748/1258/files/how_important_is_dream_drop_distance.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/71660037742.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/54432742158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8084/9852/files/nalurozomelipogosaxok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3439d636-3772-42d1-a1d0-904c3c11ee04/12785520937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3841/5269/files/sifepanurutavel.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_off00006abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABC 5148 bytes
SHA-256: 72c38011921f1fc3a857fcf22755a5d3f92c060c930cd33bbdb7a2c8ea3899fd
font_01_sfnt_off00007c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C36 11504 bytes
SHA-256: 1a69d196c6f950a4f44482945a3300db049a05ecf9bac7f4cb4da47ac44222af