PDF malware analysis — malicious · 3b6bb97b398f4434

MALICIOUS

PDF

45.2 KB Created: 2020-10-18 10:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04

MD5: 0b31bc28a8d3aefea39687761c1c235b SHA-1: 71a7492a16f46d244c51c742af956c42dc74133a SHA-256: 3b6bb97b398f443435754fbc70f8b5bbbc99a32a63d768f6978ae85319e0b0e3

184 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.
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://gettraff.ru/123?keyword=cambiar+tama%25C3%25B1o+letra+cuadro+texto+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4370052/normal_5f89efea1a933.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365627/normal_5f8bbbf9697d9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367903/normal_5f89ea2c461bf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372371/normal_5f8b603772a98.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366665/normal_5f8a2b834f865.pdfIn PDF document text
- https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/6658489.pdfIn PDF document text
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
- https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/278442.pdfIn PDF document text
- https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/paboxed.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365653/normal_5f8b81ddee654.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375515/normal_5f8a1e3e83fd8.pdfIn PDF document text
- https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/2bba1d0.pdfIn PDF document text
- https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.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/59b4b124-ed00-4344-85a9-4f7d6beca87b/zemekakefewuw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/950252dd-b084-4393-a19c-ac84229c53af/69544420910.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4557e772-095e-4508-a89a-fe942738641e/xamifofasemuponujej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/718cb81e-ba7b-41b3-bc66-98c48f94ba43/zulosasusumevedo.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000060b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60B3	5340 bytes
SHA-256: `3844cf24c34ac6b808b3a037066409d9f9e2f29f6f05cce10b1517c9b0e2c360`
`font_01_sfnt_off000072c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72C4	11280 bytes
SHA-256: `f8d86a057bf27d9fb899a735cdb73dad610bcb2262f80a2da160b653bd149937`
`font_02_sfnt_off0000978d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x978D	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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