MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of links to external PDFs hosted on disposable domains, a common tactic for SEO poisoning and distributing malicious content. One of the initial URLs, 'https://ttraff.cc/wb?keyword=nephron%20structure%20and%20function%20worksheet', is identified as a known malicious redirector. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious link farm designed to lure users to potentially harmful sites.
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.cc/wb?keyword=nephron%20structure%20and%20function%20worksheet In PDF document text
- http://files.jewellhjohnson.com/uploads/1/3/2/8/132816158/252b1d3f634b0.pdfIn PDF document text
- http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdfIn PDF document text
- http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdfIn PDF document text
- http://files.gowersartclass.com/uploads/1/3/0/9/130969993/5157883.pdfIn PDF document text
- http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdfIn PDF document text
- http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdfIn PDF document text
- http://files.lewiswarburg.com/uploads/1/3/1/3/131379115/vaxikofojenitovozex.pdfIn PDF document text
- http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdfIn PDF document text
- http://files.blackonsilver.lt/uploads/1/3/1/4/131437733/wigaremevekel-bavodivuj-lisazuraru-dasuji.pdfIn PDF document text
- http://files.benyoungerman.com/uploads/1/3/1/4/131437454/sukivararezigagemi.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://lusenexovaj.files.wordpress.com/2020/07/xotajexokatofemewet.pdfIn PDF document text
- https://gavomibew482746657.files.wordpress.com/2020/06/gafujurabomigiviwupara.pdfIn PDF document text
- https://xofosawe.files.wordpress.com/2020/07/83275123725.pdfIn PDF document text
- https://banisozix.files.wordpress.com/2020/07/juvadoguwamolelugogo.pdfIn PDF document text
- https://ruponola.files.wordpress.com/2020/06/sawepuju.pdfIn PDF document text
- https://kufexetironi.files.wordpress.com/2020/06/61224877747.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.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_off00006f10.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6F10 | 5216 bytes |
SHA-256: 0344afef6f2a7efe8eba1218d1e26f817368913ffbac11ad9b044b78092d28a1 |
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font_01_sfnt_off000080de.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x80DE | 10012 bytes |
SHA-256: d96718ce99b8bf1426bcae8b5d39b80daf6f257452482633f10ac862c5fd1914 |
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