MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of links to external PDFs hosted on disposable domains, indicating a link farm designed to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, https://cctraff.ru/strik?keyword=board+in+spanish+slang, is identified as belonging to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=board+in+spanish+slang In PDF document text
- https://site-1043662.mozfiles.com/files/1043662/67899118321.pdfIn PDF document text
- https://site-1039549.mozfiles.com/files/1039549/66689325141.pdfIn PDF document text
- https://site-1037273.mozfiles.com/files/1037273/74670671278.pdfIn PDF document text
- https://site-1039143.mozfiles.com/files/1039143/90685673795.pdfIn PDF document text
- http://files.austinurbaninstitute.org/uploads/1/3/1/3/131382320/d4733782368e.pdfIn PDF document text
- http://files.kappleton.org/uploads/1/3/1/3/131383319/4752625.pdfIn PDF document text
- http://files.marydarwalljewelry.com/uploads/1/3/2/6/132682137/bukenomu.pdfIn PDF document text
- http://files.sakuraphotographyco.com/uploads/1/3/2/6/132681062/wesofubiboda_wosipuka_tamisilifuda_togakavobe.pdfIn PDF document text
- http://files.freedom2flyda.com/uploads/1/3/0/8/130814960/9229857.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/0e99ab61-6803-4035-a844-2b917eb931a0/pinuguvovimixufirim.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4d94fc32-d8b4-44e7-9e3a-5cfb17b97165/viropoxok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e3e0d590-540b-415a-927a-582f7e9ecc2c/nimiwapevizepodevuvef.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7c254bec-dd0d-4ff6-907a-d938555ec721/dijagona.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2ff40d4e-589d-4b1e-b4d5-3ae39c6f339d/87266282591.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1438e2f9-7710-421e-ab60-a9a0f6212b0e/zagona.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ce2f3a9-3d43-4752-a333-378758d44c43/497466480.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d0e0f735-2bef-4db6-a1e8-7d983fb3b49a/57218922102.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4a058e36-6348-48be-94cd-a89ec51e78c3/putozuxivotimububasitamaf.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005949.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5949 | 5272 bytes |
SHA-256: 750b55ea7c927820e353f88724679325d4b63afe1a5c1a26184bb0e1bfcb8979 |
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font_01_sfnt_off00006b2f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6B2F | 10428 bytes |
SHA-256: db1f008f543349292d5a36fb66d2934c1df716a0ba5699f35a3041b8c7ce4111 |
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