Malicious PDF — malware analysis report

Static analysis result for SHA-256 726c73ae8d8acf1b…

MALICIOUS

PDF

40.5 KB Created: 2020-10-11 12:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-12
MD5: 7a9b3d745b337609b29b996e37ad5966 SHA-1: 0e3c83462843303903b3e5e6f633978a36884f38 SHA-256: 726c73ae8d8acf1beea2a9ef81f9655db3d1d62116728ecba97ec26d08bdf6e1
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=ruler+measurement+worksheets+pdf In PDF document text
    • http://naloxipo.poguesinc.com/uploads/1/3/1/6/131606396/jagesudepebumer_xebujijuj_kelet_juweniju.pdfIn PDF document text
    • http://files.hhhschoirs.com/uploads/1/3/1/3/131398428/8542871.pdfIn PDF document text
    • http://samuveti.noramacquarrie.com/uploads/1/3/0/8/130874422/dobax.pdfIn PDF document text
    • http://lutugadi.ccmc888.com/uploads/1/3/0/7/130775923/lakadi.pdfIn PDF document text
    • http://files.alphapsikappa.org/uploads/1/3/1/3/131384306/cbf36ce7.pdfIn PDF document text
    • http://files.houseofbellator.com/uploads/1/3/1/1/131164473/4148266.pdfIn PDF document text
    • http://files.mypipelinetraining.org/uploads/1/3/1/3/131383476/berotamuz_kufowalixik.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/webexutunikizitapaderowi.pdfIn PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/bimizurozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006143.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006143.bin)
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/american_horizons_volume_2_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0390/6717/files/molagebixemenoboganara.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_off00006143.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 5444 bytes
SHA-256: 4772cbfb3753fdc688e634c00dbeac4f16f5f5294441f4d0834d4d04d8df6f7f
font_01_sfnt_off000073ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 9872 bytes
SHA-256: 9a4d8ab568de26f3bf4ce29b44038c43e07139cc4e12a68eb16e6411113c2199