MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious File
The PDF document was flagged as malicious by a machine learning classifier and contains a critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic, indicating it points to known malicious infrastructure. Additionally, a PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded links to external PDF files, likely for SEO manipulation. The document body is heavily obfuscated and contains a URL that appears to be part of this link farm. No scripts were extracted from this sample.
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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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=diabetes%20insipida%20nefrogenica%20pdf In PDF document text
- http://files.op-com.co.uk/uploads/1/3/1/3/131380504/9381456.pdfIn PDF document text
- http://files.peterpauljones.com/uploads/1/3/2/6/132682819/e830c090.pdfIn PDF document text
- http://files.industrialinsulationsupply.com/uploads/1/3/0/8/130874160/fowibulamak.pdfIn PDF document text
- http://files.hermionemerry.com/uploads/1/3/1/8/131856034/wozoruzo.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/1/0430/7327/4018/files/vorawijigasezul.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8100/7255/files/20278500442.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8837/9032/files/42437659354.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4193/7818/files/16838568953.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6717/9165/files/bajizebilolujul.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6249/2324/files/wepesujuminagujagawazifo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6835/7796/files/24105934233.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2816/0420/files/koponog.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/5397/9550/files/60905851577.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8675/7536/files/1326356124.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4052/9816/files/kuzopizufurorogub.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/9180/2777/files/duxirefufatujo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4227/5485/files/2006_scion_tc_repair_manual.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_off00008466.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8466 | 5428 bytes |
SHA-256: 7a7745d0018d532e8bdaf5c5e4558c5626431fce2845532b8b759422a8875419 |
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font_01_sfnt_off000096ea.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x96EA | 13264 bytes |
SHA-256: 97f626b056612702ec9a520e4218ece98cb314afac917c3b298897f4b3ed8aa0 |
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