Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd5b77d37f47bbb…

MALICIOUS

PDF

50.8 KB Created: 2020-10-04 01:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-26
MD5: a08da4c1a226e04488d6c663f8abc246 SHA-1: 067cd3ed8a4f3988b503d03e15c2deb90cb2ea85 SHA-256: 3dd5b77d37f47bbb5faea41b3bff69952156dbb2776bc6889ef2b28c21d07c70
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/strik?keyword=reading+plus+answers+level+k+blogspot In PDF document text
    • https://site-1036748.mozfiles.com/files/1036748/degefobevuzidog.pdfIn PDF document text
    • https://site-1039793.mozfiles.com/files/1039793/78316975288.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/gogigumivenalakavevusu.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/1/0496/3100/2777/files/business_strategy_game_guide_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/a_balance_of_power_should_lead_to_less_stable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2479/7855/files/west_point_on_the_eno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7229/4564/files/jodijuzusutifipukurexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4174/1205/files/8074675651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe93040b-bb87-4ad8-9e77-d1ee47213116/61328448804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e46cb9-5378-40b0-9aec-1f80bde53717/daloleziwemidorifubilaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21f25e1-30e9-49ba-b7ae-bc97483fe12b/4348417191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759d58f0-1f99-4297-bead-a8083a0b3be3/78579455394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834be25d-db57-4b3a-8b26-51c84a384e88/59428773034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30aa5882-27ec-456a-933c-0a92d3b29290/12627113138.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_off000086f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F1 5488 bytes
SHA-256: 1f7d5d3ba1a4da3e4e85524be8fb01e674f62714bf3648bd7f780b5ed3062080
font_01_sfnt_off000099c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C2 10680 bytes
SHA-256: 5c1b53a4302498fe9465be5174acfa7af910396638c199023faae42e46becb1f

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