Malicious PDF — malware analysis report

Static analysis result for SHA-256 552ff904de491f7f…

MALICIOUS

PDF

41.9 KB Created: 2020-10-11 18:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-20
MD5: 7bcb89ae80d9dfbcac2f0a3a092483a4 SHA-1: c7bb246553efa187c1bea64113eff7bfd1496e92 SHA-256: 552ff904de491f7ff54fdc5c488af51563b23859496a84c026b592d2ea6a4061
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://cctraff.ru/strik?keyword=kubota+rtv+parts+manual In PDF document text
    • http://zasex.insmarket.com/uploads/1/3/2/6/132695543/5064419.pdfIn PDF document text
    • http://bakid.leasemyrv.com/uploads/1/3/1/6/131636745/c91a54782302.pdfIn PDF document text
    • http://files.ashleyjoleendoulacare.com/uploads/1/3/2/7/132740172/makepe.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/89452000730.pdfIn PDF document text
    • https://site-1042277.mozfiles.com/files/1042277/19447727292.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/63790304000.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000066ad.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000066ad.bin)
    • https://uploads.strikinglycdn.com/files/442bdd1d-b558-45c9-a1ec-aec840e5114b/tusokaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d30ac7-cc04-466c-bd35-fde1cecd6ae2/muzupabisuxubiresid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c074b821-1ada-4f34-b5c0-025d8c5e8501/56497503700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f59394-98fa-4533-bf14-9fd7b8331959/pezapexumelumabijobovis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278244ee-6d8a-4ad8-b3aa-e2869e7f214b/tozamojolijufenikeworevel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf4f926-38c2-4162-9406-1a9b2e1bfb7a/zotebokisire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8306dad-b287-45b5-b5ef-eb31ebd0476c/46787591737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8aa1331-27a6-4a84-84f4-e9e1b631da71/77066518861.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_off000066ad.bin)

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 5136 bytes
SHA-256: 5b7068fa942389ae6ab457a04bb402567510ea0ed1bfd29f54010c69ac3d89e2
font_01_sfnt_off00007814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7814 10328 bytes
SHA-256: 1f4a98abd47d199670530f7dcecd9675f2656b0cedd5faec86bd09d7220a5cc8

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