PDF malware analysis — malicious · 9183adac4807ef49

MALICIOUS

PDF

50.1 KB Created: 2020-10-27 16:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 54d52b69bf488aca0d82cf7f07aed459 SHA-1: 125c37e4720cf7b8daf550ed2256d71fa51b4bce SHA-256: 9183adac4807ef4923442baece5cd87392b1a0d8efe7e25c55f51942792c5565

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?keyword=oldways+mediterranean+diet+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4382960/normal_5f8fe40759bbb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369905/normal_5f8b4f4583e1e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368770/normal_5f89f75b49b18.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369505/normal_5f8fb6e81a7f6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373985/normal_5f8d415034d06.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391602/normal_5f8feeafbc88c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378836/normal_5f8b1097ccc8e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367919/normal_5f8a4803abcde.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370299/normal_5f906939233c4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368242/normal_5f8e26d06ef0b.pdfIn PDF document text
- https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/baret-ramoxupuxija-liwefikubibekan.pdfIn PDF document text
- https://wenadexedodoren.weebly.com/uploads/1/3/4/3/134322255/5874025.pdfIn PDF document text
- https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/texis.pdfIn PDF document text
- https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/692942e1d.pdfIn PDF document text
- https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/49b86b5abb46524.pdfIn PDF document text
- https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/8eb8b.pdfIn PDF document text
- https://siregudak.weebly.com/uploads/1/3/0/7/130738759/72023f20cf017.pdfIn PDF document text
- https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/wezodabetipowo.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
- 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_off000075ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75ED	5084 bytes
SHA-256: `38e8913ba5632ecdd143e8c41d622216c740faee869d665b61300afc67eb8342`
`font_01_sfnt_off00008730.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8730	11656 bytes
SHA-256: `bbb73df2a2f16fcb11785fe2a61c808996517e10a8df38ae3a971659eb257ad2`
`font_02_sfnt_off0000acf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACF2	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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