MALICIOUS
90
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, which suggests an attempt to manipulate search engine results or distribute content from a large number of URLs. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent. The primary attack pattern observed is the mass linking to external resources, likely for SEO manipulation or as a distribution vector for further malicious activity.
Machine Learning
- Nyx PDF Classifier malicious score 0.8173
Heuristics 2
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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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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 http://www.gorillawalker.com/colourful-food-chinese-readers-series-d-level-1-orange-chinese.pdf
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- http://www.gorillawalker.com/time-varying-image-processing-and-moving-object-recognition-proceedings-of.pdf
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- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/
- http://www.aiim.org/pdfa/ns/extension/
- http://www.aiim.org/pdfa/ns/schema#
- http://www.aiim.org/pdfa/ns/property#
- http://www.aiim.org/pdfa/ns/id/
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