Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f72a7948911163…

MALICIOUS

PDF

32.7 KB Created: 2020-10-29 15:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: e4f068fd6d045b8a157ef8403b858b08 SHA-1: 657f7c8ab2fac4c82164243d0908796be3947216 SHA-256: a4f72a7948911163fa464146c2d10b0e77e2358e3369734e5e5a0eff7f66990a
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/wb?keyword=yoga%20poses%20pictures%20pdf In PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/digonelebe-xibowi-xekujosaka.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/6350326.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/beximubozezesekok.pdfIn PDF document text
    • https://poxuxeket.weebly.com/uploads/1/3/3/9/133997588/javemosut.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000442e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000442e.bin)
    • https://cdn.shopify.com/s/files/1/0500/8844/4068/files/que_es_la_fisica_cuantica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/50860947432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1561/6681/files/human_muscle_anatomy_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7667/4220/files/pikopinezejinoxawarop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4967/5671/files/55399543523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd91b12-291e-4467-bec0-37c049a9107b/mawet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1607/9528/files/duvuwaguzeronilotepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8226/1673/files/rozitejifenenejosubi.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_off0000442e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000442e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x442E 5252 bytes
SHA-256: b23baa819aadfec1443b38ce6711afb87bf752f6abfc89d880342c4bb22cf33a
font_01_sfnt_off0000561e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x561E 9488 bytes
SHA-256: 2ef3fdd055d98aed0b2bef212a1d44abea26a070d72ed3d01fe816d39eb940fd