Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca632253fb6ab638…

MALICIOUS

PDF

50.3 KB Created: 2020-10-09 22:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0fd4f90b84e7abb55e9e83c1fc8209bd SHA-1: 85889c53a4840e953a9996b042af7dea65d9b938 SHA-256: ca632253fb6ab638aa73748b6d782180795ec080a5174623ef54bef7021dc1f1
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://ggtraff.ru/strik?keyword=hank+the+cowdog+books+for+sale In PDF document text
    • http://kuwuzup.myhola.co/uploads/1/3/0/7/130740199/9305089.pdfIn PDF document text
    • http://files.zsquaredcosmetics.com/uploads/1/3/2/6/132696113/3593727.pdfIn PDF document text
    • http://files.whyyoumatter.org/uploads/1/3/0/7/130775813/933dc.pdfIn PDF document text
    • http://files.ms-miller.org/uploads/1/3/2/7/132712623/4556377.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/68343429472.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/pavobun.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/fiveronuwikad.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000085e2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000085e2.bin)
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/bollywood_movies_einthusan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/self_management_skills_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/the_protestant_reformation_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/72596143485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1994/7160/files/oracin_de_la_noche_para_dormir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd7b4eb-1223-402c-97dd-dc4d7c8eb2a7/pirujitabezigunoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f10e09-36c9-4eda-b1f3-63d7324416da/tazologetegenade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cd882b-a4cb-4cd3-84d9-ae247c21fd22/tugesodebugesagevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e3cf75-bf64-4e45-83bb-2245692a5048/25888849712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc523674-3bd0-4b0b-a89d-a691491513eb/boxedapamozudorokalez.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_off000085e2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 5540 bytes
SHA-256: b4076fac24b9092b6f225919e0c1e384811403ec86306f8de7e7dde6b286f17f
font_01_sfnt_off000098c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C6 10508 bytes
SHA-256: 7b33874f76ccd260a2e1a6b96b515d2e912e6fe50c439b87956797bf6535017f