MALICIOUS
124
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded URLs that point to known malicious redirector infrastructure, specifically 'https://traffking.ru/123?keyword=chemfiesta+worksheet+answers'. The document body, though heavily obfuscated, contains references to worksheet answers and the authoring application 'wkhtmltopdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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 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://traffking.ru/123?keyword=chemfiesta+worksheet+answers In PDF document text
- https://cdn-cms.f-static.net/uploads/4411694/normal_5f93a23c84eb7.pdfIn PDF document text
- https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/8439778e0f.pdfIn PDF document text
- https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/nodelorofe_ritizolomireku_gavefava_jafilovolideke.pdfIn PDF document text
- https://nepajomawowezuw.weebly.com/uploads/1/3/4/4/134462508/nopezolowajab.pdfIn PDF document text
- https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/66f9947149ff2d.pdfIn PDF document text
- https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/37bb5f20f3d8614.pdfIn PDF document text
- https://fexaramexi.weebly.com/uploads/1/3/4/6/134642664/7998228.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379362/normal_5f8c0976c6775.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/gedesisumi/timonaz.pdfIn PDF document text
- https://s3.amazonaws.com/wofaxil/healthcare_training_institute_joliet_il.pdfIn PDF document text
- https://s3.amazonaws.com/pazerogasarinu/low_back_pain_relief.pdfIn PDF document text
- https://s3.amazonaws.com/fejenijovekozu/30258783715.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_off00005b90.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5B90 | 5036 bytes |
SHA-256: c7c0fa0a426c0e33908f8964d3baf19484031a3aafd6190fdc821b604a9448b0 |
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font_01_sfnt_off00006c90.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6C90 | 10288 bytes |
SHA-256: fb4795307b53f23789c03b982262c72e6915c1b5c5a7a88f4d4ea08b4a973958 |
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