Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6373cfd63d4dca…

MALICIOUS

PDF

45.9 KB Created: 2020-10-12 01:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 271ee1d15ae2c6ff36bb34f8d7c34abb SHA-1: 0e9701c417517645208ab974b08e136d7fe4ba3d SHA-256: ca6373cfd63d4dca6ac536b65c12628d80cffed60f7d0f659647c35b96596e25
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=schroth+method+exercises+pdf In PDF document text
    • http://wifamidet.silverjewellerybypeterkibbles.com/uploads/1/3/1/3/131379856/muxexipe.pdfIn PDF document text
    • http://files.edcentervi.org/uploads/1/3/0/7/130740563/fesomoxuneduf.pdfIn PDF document text
    • http://dujaveket.shoppoorgeorge.com/uploads/1/3/1/1/131163695/79328.pdfIn PDF document text
    • https://site-1038310.mozfiles.com/files/1038310/perezavepubunegabon.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/dalakugoli.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/45308598573.pdfIn PDF document text
    • http://files.vanessamariedewsbury.com/uploads/1/3/1/1/131164558/047571d0ed.pdfIn PDF document text
    • http://files.josephgoff.com/uploads/1/3/2/7/132740804/afb94b3b43a8.pdfIn PDF document text
    • http://files.legaljj.com/uploads/1/3/1/3/131379828/9025618.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000608b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000608b.bin)
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/wujuvezukisexapovef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5041/7307/files/csi_algebra_polynomials_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/fanfiction_loud_house_tales.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_off0000608b.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000957b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000957b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 5324 bytes
SHA-256: 61ad231c0b10e9524b547d60d3ef74e8e65513b12a4f6c7530a4dd04bdaa89bc
font_01_sfnt_off00007283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7283 10140 bytes
SHA-256: b37deeb864fa36fc3768d5e602305dd66de8cf276d64f94f8b2a5b6b6558d0cb
font_02_sfnt_off0000957b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957B 16232 bytes
SHA-256: 68eef4b610644b6a98f668349b58b424e8310755c20c018328a8321db0e17a89