Malicious PDF — malware analysis report

Static analysis result for SHA-256 7938893d5513451c…

MALICIOUS

PDF

42.6 KB Created: 2020-10-24 19:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: d863460e0040d4a09133d9ed40c6673f SHA-1: e5093cb44e13edff81e5891385dabd5bc9905373 SHA-256: 7938893d5513451c5b5e76e8730effeaf31b8fca5c9fa23ef4eb591449826a73
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://ttraff.ru/123?keyword=tutuapp+old+version+apk+download+ios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f9399a37789c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8700d9d6380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f8fc88bd4ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5f8fe81f59165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f92c15e4c7c6.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/vajomepidibaxi.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/renuroz_ligaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f88d3fc36d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f9248149a2f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bergamot_doterra.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/chemistry_lab_manual_class_9.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/51317743665.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/perimeter_and_area_of_parallelograms_triangles_trapezoids.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/misenogizotunowufuji.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/analysis_of_kartilya_ng_katipunan.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/vopepedonipawo.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/arm_assembler_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/anabolismo_y_catabolismo_de_las_proteinas.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_off0000643e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 5116 bytes
SHA-256: 24eff510e18857c1ae77056dfdf3ac221eab27518d9a8b058aeb4f2e8169007e
font_01_sfnt_off000075c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 12100 bytes
SHA-256: a42d62dd4d097bf56d36d44ab59bc19583380b41d9144fc089ddd4def683e912

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