MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file contains numerous links to external PDF files hosted on disposable domains, indicating a link farm or SEO poisoning attempt. One of the primary links directs to known malicious redirector infrastructure, suggesting a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, and the malformed stream length heuristic further supports its suspicious nature.
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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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://ggtraff.ru/strik?keyword=acls+algorithm+pdf+2020 In PDF document text
- https://site-1039261.mozfiles.com/files/1039261/52344712544.pdfIn PDF document text
- https://site-1036850.mozfiles.com/files/1036850/gozuzunoj.pdfIn PDF document text
- https://site-1036926.mozfiles.com/files/1036926/33028666027.pdfIn PDF document text
- https://site-1037091.mozfiles.com/files/1037091/bubonirimuge.pdfIn PDF document text
- http://files.atlantapavingsolutions.com/uploads/1/3/1/4/131409794/8236030.pdfIn PDF document text
- http://files.truluckcharms.com/uploads/1/3/1/3/131383533/7f63a1f7584.pdfIn PDF document text
- http://gubujutib.discoverohiopyle.com/uploads/1/3/1/3/131398560/5321800.pdfIn PDF document text
- http://files.wcpha.org/uploads/1/3/1/1/131163945/pafipapinaxu.pdfIn PDF document text
- http://files.prestamoscreditoetc.com/uploads/1/3/0/9/130969594/5804120.pdfIn PDF document text
- https://site-1038331.mozfiles.com/files/1038331/14259088172.pdfIn PDF document text
- https://site-1036671.mozfiles.com/files/1036671/97946465226.pdfIn PDF document text
- https://site-1038700.mozfiles.com/files/1038700/xosodotovuj.pdfIn PDF document text
- https://site-1043752.mozfiles.com/files/1043752/divibo.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/1/0440/8773/8533/files/60930233509.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/3631/4280/files/better_homes_and_gardens_rectangular_umbrella.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00012b43.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B43 | 5832 bytes |
SHA-256: cf29e8385869f38cfca8ccc6a671d48d396a11d6df32833bc0dbfbb490087d6e |
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font_01_sfnt_off00013ef9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13EF9 | 13508 bytes |
SHA-256: 9e30b9adc32f2716c536370f7e241ed3397d49e5d79c515d155b6c973799a104 |
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font_02_sfnt_off00016a12.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16A12 | 16132 bytes |
SHA-256: d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7 |
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