Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3c21421c8848cb…

MALICIOUS

PDF

38.9 KB Created: 2020-11-03 04:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: f87d652de4f44454b1b80d1f4eebe900 SHA-1: aca899db878f7b87b235373c10c9e7a35322cb9c SHA-256: 4e3c21421c8848cb80cd49e83e049b3728dc4adb8a4dba8c122bb156616fd3f7
134 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.
  • 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/wb?keyword=technicienne%20de%20surface In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f9341df8779b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5f9de952857a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f93a9de2dff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f87a9f3d959e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f9fcc1653f41.pdfIn PDF document text
    • https://jijibaduwa.weebly.com/uploads/1/3/4/4/134495912/xawoka.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/4800481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5f9a11512543f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8580/0645/files/lord_you_have_come_to_the_seashore.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/nodiwavadamapedu.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/flyy_girl.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 5024 bytes
SHA-256: dffbc87fdf7f32ea690f8a944df0e34138f471684a3ce70ff9fd248080ff3757
font_01_sfnt_off000069d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D2 11080 bytes
SHA-256: 089dfb8336718f383773baf4ab4c752e8060a4441edc8960fefd29f34142cb8e