Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c2e2d22adb146a…

MALICIOUS

PDF

65.5 KB Created: 2020-10-01 20:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-13
MD5: 402824d839a8fecd40c30bc0bfffd721 SHA-1: 89c9de9169d538212e81f4015764e7685f56ba63 SHA-256: 93c2e2d22adb146a4d3cf8fa3c9f78aa1c851891616adfd795b3416ddb4e6858
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=carbocation+reactions+pdf In PDF document text
    • http://files.kingvan.com.au/uploads/1/3/0/7/130739239/7988851.pdfIn PDF document text
    • http://files.ericlhsu.com/uploads/1/3/0/7/130739227/tivub_tinofowiluze_fajupefewiv_wafep.pdfIn PDF document text
    • http://jafemusat.goffstownkofc.com/uploads/1/3/0/8/130874629/b5eacf146c4.pdfIn PDF document text
    • http://files.syrenialifestyle.com/uploads/1/3/1/4/131408899/teteka.pdfIn PDF document text
    • http://mekopir.hptservices.com/uploads/1/3/0/7/130776078/6520764.pdfIn PDF document text
    • http://files.recoveryhumanface.org/uploads/1/3/2/7/132740445/tidiwojuga.pdfIn PDF document text
    • http://files.wolvesplaycafe.org/uploads/1/3/0/7/130740591/3418062.pdfIn PDF document text
    • http://files.mandrcatering.com/uploads/1/3/1/6/131637714/suditanuwila.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000b7dc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000b7dc.bin)
    • https://uploads.strikinglycdn.com/files/0524ab18-94da-48db-8732-5000abfd458b/makimawukomusaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9030/3389/files/fadizezana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2501/7250/files/naxezakodem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8300/1756/files/sezozamixajimufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/bunilekixofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5366/5442/files/stihl_ms290_chainsaw_repair_manual_free_download.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_off0000b7dc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DC 5160 bytes
SHA-256: 414082568466cc16bc91a36b509e17e5df6be9b19aa4149f197dc377845ba205
font_01_sfnt_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 15004 bytes
SHA-256: 9084c120c52678a9a359bf8c6cd46e04236fe82556bd444466ea05b61dd0580b