Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e377cfddae3813d…

MALICIOUS

PDF

44.1 KB Created: 2020-10-23 16:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: affc1fcc34dd5752cb34299952ab902e SHA-1: d54ef32dc25884531acdc360fde2dc8990876b75 SHA-256: 4e377cfddae3813dd106e63da877a157b359a52c610ba1dc601fc2d62b2d1986
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://gettraff.ru/wb?keyword=recovered%20pdf%20files%20not%20opening In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8b72b5f3f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f915549c6e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f8cc5c66efc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6cccb4b-6b56-4ec6-ae9f-a8209314cf71/wesimajupubasori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a355699-7921-4941-8dff-309f9c0a6e48/lapugevalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b34fb82-eba7-4733-84d3-31e8834e5ed3/wiwimiduzarewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/alloy_wheel_manufacturing_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/5083182994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9548/2261/files/dense_irregular_connective_tissue_found_on_the_surface_of_a_long_bone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1336/4648/files/36153470610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2610/8575/files/72013743946.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/training_needs_analysis_process.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zotofikefemipajanozizu.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/abituriyent_7_jurnali.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/93674722502.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/perkembangan_akuntansi_internasional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/39313191538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4460/4584/files/sabiwijenomotovipupuvebuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9866/3848/files/juvexewusimaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7770/4607/files/borderlands_2_character_creation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4493/8143/files/lenox_federal_platinum_accent_plate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4173/8911/files/leps_world_3_2.6_mod_apk.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_off00006c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 5180 bytes
SHA-256: c01c7f7217a76be89284f04c772d436689943138395151b4cfeedc0a03d65055
font_01_sfnt_off00007dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 10832 bytes
SHA-256: ac894f867dc9d85c3008018ab1b72e36f5f86b5ecce37fcfb4afbc76ef66cb1b