Malicious PDF — malware analysis report

Static analysis result for SHA-256 445d76ea97312210…

MALICIOUS

PDF

45.3 KB Created: 2020-10-29 11:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: df7b5ed31cdbcb2e20738a1a14b24446 SHA-1: 0f4dc3b9021ab9e3c700d965511e4357cb4a8419 SHA-256: 445d76ea973122108ee239ac66949c3dc298deecb02da3edc88b5ee339b77ac2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to drug test results and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.
  • 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://cctraff.ru/123?keyword=first+check+drug+test+results In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f87042be6661.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/4751946.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/4425566.pdfIn PDF document text
    • https://sumulejuno.weebly.com/uploads/1/3/4/3/134361372/tejar.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/nusumewik_lifavewixojud_jugofapejit_kexugezifip.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/5842945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f9a85b171e59.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/82f9484f-dd98-4dc0-9f94-9f23056d241f/22500377312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3361da-3b77-4900-889e-a2727d17c799/55772402076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8be855-b794-46cc-bb23-ee96ca91ec76/semozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be37a60-3850-4e4d-a1af-524d90b5be99/dijifaxafizabesijuturi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0dbf0c-48c2-4a7a-9ee3-266e582345d9/65705293467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208faf28-07d8-4066-bf78-52b3069fd2ba/94385635669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a3e545-80b0-4906-8fc7-ac6e02a8a997/59316107626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ed32cc-40ef-4e32-a163-2b73813d631f/bovudapapumoxumogipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0962/8570/files/funciones_principales_de_los_lobulos_cerebrales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8824/6432/files/6367343763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3312fa00-60f2-4c27-ac39-e32830f653be/puwagizevasusox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a6d1a7-17ef-4e5d-83fd-38cdca9c3335/reddy_forensic_medicine_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3acb7ff-619e-4904-bd51-10dc9f4c1219/zenuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f446a5d1-d415-4896-a167-d6284dba1f5f/putugowaxijujexo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 4676 bytes
SHA-256: bda6cbb496822b30ed4b8d5ac9a02716cf5dd41877df1bafbaf9e1c7f580c4bc
font_01_sfnt_off00007472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 10916 bytes
SHA-256: 76671a716f7e1480b2834f4d567cd1e4b04e4bf7bc4827601b612167e5d9be7e
font_02_sfnt_off000099b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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