Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dab2a6c3ac79f3…

MALICIOUS

PDF

66.5 KB Created: 2020-10-23 10:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-27
MD5: a14444a5f23180ec30179e7a9396db3f SHA-1: 09646c94978a272a60c9cb7e9e3622194ab452ea SHA-256: c5dab2a6c3ac79f34aadf0595ac12384f168ae1d7bae7d24f2e0e867e50506b4
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ggtraff.ru/wb?keyword=colours%20worksheet%20spanish In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f8865626efdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f905ab8c118b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5f91ccde178dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f8a63d4d1aff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/88c72bde-8acd-46ff-8f82-3d298db36b1b/4431623574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87314f10-2cd1-4852-8305-826bd2df9fab/84941605242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b4fd93-369f-4d56-b2e4-81f88a5f6f95/fituxuzani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce32ff2-338f-4c9a-bae6-26fd94092a34/3065251495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681ca4b0-585c-4f1e-8ba3-5221ef0564ee/kibijeg.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/cardiopatia_isquemica_scielo.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/types_of_refractive_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/12208671517.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/juvegipebugirafo.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/short_history_of_english_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71890fc-79e7-4425-8666-8d7bc9e3f080/gedozikalesopof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bfdd12-ce80-46f3-81fe-82b050a6b8c6/32709699447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5dee9b6-e2e4-4082-983f-932ed7d00278/6782346732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01aa5bd-90e1-47a0-8d93-7016f386ae33/19054661277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fdc0b87-57a3-4b1c-865a-7d43119fdc4e/famivelunubupikuzegu.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/28086634347.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/31938521154.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/kulenelawoxulipanipoworu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b2df20-a09e-46da-900d-1590cd54320d/94078044134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ecb74d-bf99-42aa-9c60-b60a7b18151c/88793391571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba61bfb-ec2b-46bf-aae1-19dc1ea6845a/62783241793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15608bc4-55de-40e8-b0df-3e614d4f5200/93605829681.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c4ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC4CE 23572 bytes
SHA-256: cbf3b5a94e5039c2337d4c60c3326b358177516c6157d7d40148e24b47096723
font_00_sfnt_off00008e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E55 4968 bytes
SHA-256: b752fa48c096c614efb6df38ef8084bc5e5ed8b634e869f131fa17d23b5c81e6
font_01_sfnt_off00009f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F43 11144 bytes
SHA-256: 6ff2b32e341664cdb9c0204b86796cbc22a236a4cf5d3047963bed134c607292
font_03_sfnt_off0000ed40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED40 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378