MALICIOUS
224
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of external links, many of which point to other PDF documents. One critical heuristic identified a link to a known malicious redirector at https://cctraff.ru/strik. The document body, though heavily obfuscated, contains a reference to this malicious URL, suggesting an attempt to lure users to malicious content. The presence of numerous links and a malicious redirector indicates a likely phishing or content-luring attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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=miller%2527+s+review+of+critical+vaccine+studies In PDF document text
- https://site-1036923.mozfiles.com/files/1036923/jokafunivafeja.pdfIn PDF document text
- https://site-1036659.mozfiles.com/files/1036659/9737960420.pdfIn PDF document text
- https://site-1037010.mozfiles.com/files/1037010/37548355567.pdfIn PDF document text
- https://site-1043040.mozfiles.com/files/1043040/82657358769.pdfIn PDF document text
- http://kuxope.kingdombooking.org/uploads/1/3/2/7/132712127/guwis-farugarive.pdfIn PDF document text
- http://garojix.musiccitypetpartners.org/uploads/1/3/0/7/130776445/1779049.pdfIn PDF document text
- http://pidasaz.inspirationfitnessandnutrition.com/uploads/1/3/0/7/130775288/koxonisevamukakozi.pdfIn PDF document text
- http://files.kristinandrewsyoga.com/uploads/1/3/1/4/131453124/sovisigusi-giwitoronokax-sutat.pdfIn PDF document text
- http://files.superiorsupportsrvs.com/uploads/1/3/0/8/130813325/a1763cfee4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9726/0192/files/2_64_pulgadas_a_milimetros.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/4802/8328/files/nojejus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/6062/8122/files/schlumberger_malaysia_organization_chart.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/423e2424-d140-44a2-babf-ea6b0210a55c/zamevo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/898b8a8a-49b2-481d-a826-3c902519dc76/51883353652.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/de8e0797-ace2-485c-b4d5-7cf5621a019f/53452880941.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/29561fc3-2340-452f-bd5c-ef6cff74df49/6618710342.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d20aca7-c667-4f60-af95-8f38414cfefa/35597778115.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_off00009dc8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9DC8 | 5208 bytes |
SHA-256: ddd97604037690b5dc703222eee8ef1b45d45b5bf3d71f4cd3e8ca70210d7915 |
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font_01_sfnt_off0000afb8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAFB8 | 10388 bytes |
SHA-256: f06348507cb8bcca3deb458f16d870f9768e18708f5e6c4401d1d40c869c00db |
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