MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
T1059.001 PowerShell
The PDF contains numerous embedded links, including one pointing to a known malicious redirector at `ttraff.ru`. The document body is obfuscated but contains text related to "steel structure design book pdf", suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and distributing malicious content. The ML classifier 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://ttraff.ru/wb?keyword=steel%20structure%20design%20book%20pdf In PDF document text
- http://files.holisticimpactfoundation.org/uploads/1/3/1/3/131398253/fivebib.pdfIn PDF document text
- http://files.imagineclayavenue.org/uploads/1/3/2/7/132710748/15f8e735.pdfIn PDF document text
- http://files.naturesspiritflytying.net/uploads/1/3/1/1/131163932/mokokajapeluje_zirunenomipazo_zujuguwumiko_sukugetot.pdfIn PDF document text
- http://files.ucra.us/uploads/1/3/0/9/130969993/maramere.pdfIn PDF document text
- http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdfIn PDF document text
- http://files.match-gems.com/uploads/1/3/0/9/130969243/waruxe-gibotusupuwe-viputefetapaj-walugogigebomev.pdfIn PDF document text
- http://files.atartisticexpress.com/uploads/1/3/1/4/131408153/1542301.pdfIn PDF document text
- http://files.thomaschristopherhaag.com/uploads/1/3/2/3/132302924/971d4.pdfIn PDF document text
- http://files.brushandbranch.co/uploads/1/3/0/7/130740344/2297158.pdfIn PDF document text
- http://files.beerandwinefiltration.com/uploads/1/3/1/6/131636927/bejerovakezazajan.pdfIn PDF document text
- http://files.vellusandterminal.com/uploads/1/3/1/6/131606874/45cbdce0e9d3b9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://julatepos.files.wordpress.com/2020/06/25423558491.pdfIn PDF document text
- https://xizokegiji.files.wordpress.com/2020/07/83710815901.pdfIn PDF document text
- https://wovavekaf.files.wordpress.com/2020/07/40146173472.pdfIn PDF document text
- https://gakazorex.files.wordpress.com/2020/06/4863066417.pdfIn PDF document text
- https://momunijubu866698461.files.wordpress.com/2020/07/daranipalutaboxoxuz.pdfIn PDF document text
- https://zuterejesami.files.wordpress.com/2020/06/10873673618.pdfIn PDF document text
- https://kanizewelit.files.wordpress.com/2020/07/40459026369.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5598/8374/files/narazelakuj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/4041/6678/files/joraxe.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_off000066a7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x66A7 | 5300 bytes |
SHA-256: 9e60ba582c55be411a0761c78c25778437c63a19731f29fe87793d3d13546fca |
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font_01_sfnt_off000078ab.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x78AB | 2116 bytes |
SHA-256: 33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9 |
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font_02_sfnt_off00008275.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8275 | 15472 bytes |
SHA-256: d16eb662084ff155e01c4a88eb37535da3776f8441ba26b4ed4528a418f048c5 |
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