Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bff53a789897a1…

MALICIOUS

PDF

39.5 KB Created: 2020-10-26 13:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 111a98f4c1917f94cab26c221c90cf8e SHA-1: 8d9dc20caee148f17b52634bd4640f2409de895c SHA-256: a8bff53a789897a17bade61c9e4ffd72b957e625457d853354d52f4103a9e8ba
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=multiplying%20decimals%20by%2010%20100%20and%201000%20worksheet%20year%205 In PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/pajaxot.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/xakozaduv_vuvowi.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/a170e51eb096.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/a7516413002985d.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/topasiri_titexug_tikebunevurex.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/lixila_vuraxizuniko.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/4451340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f9548648ae32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f95ff74d5388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f87d1124061e.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/depression_causes_and_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/ak_jain_physiology_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/financial_risk_management_process.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000056b1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000056b1.bin)
    • https://uploads.strikinglycdn.com/files/f2fd5fdb-770c-4bb7-8c79-a10ad0112534/31516127013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f0553a-2761-4051-bb62-6b7fa00b0464/binder_clip_catapult.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd576fe-6c99-4cfd-9c00-706ef4cd3495/sitijajilipog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54ad112-b4e5-41ed-8dcc-9c48b5a6b9b1/6180814976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93c2772-c433-4d1f-accc-2b2c102c0112/propiedades_de_integrales_definidas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4e29da-2d8d-4a0b-9b16-d1311ce09429/vasapedebovupaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fc80c4-dd29-4a2a-956e-493329094830/wumomomezakunu.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_off000056b1.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B1 6208 bytes
SHA-256: 6e8236d8762a3f96bc465c08a7109e41fbc6bf33166b9d7e45a23ed9ffe5297b
font_01_sfnt_off00006bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBC 10616 bytes
SHA-256: 752f024cfa0d99927ae78e53ac134cf45dc964da129a74d12820f65ba058e539

Open this report in the interactive analyzer, or submit your own file for analysis.