MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a deceptive lure for a 'Principles of Virology' PDF, which is a common tactic for SEO poisoning. The primary embedded URL, https://ttraff.ru/pify?keyword=principles+of+virology+pdf+free+download, is flagged as a malicious redirector. The document also contains a large number of links to other PDFs hosted on various domains, indicating a link farm designed to manipulate search engine results. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious redirection attempt.
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/pify?keyword=principles+of+virology+pdf+free+download In PDF document text
- http://kupis.renewcleaningservice.com/uploads/1/3/2/6/132695818/womevoketojikosututi.pdfIn PDF document text
- http://files.ewgic.eu/uploads/1/3/1/1/131164506/d584456510.pdfIn PDF document text
- http://files.nationalnightouteasterndistrict.com/uploads/1/3/1/4/131437702/5118415.pdfIn PDF document text
- http://files.buttercreamlane.com/uploads/1/3/1/6/131637190/4422115.pdfIn PDF document text
- http://xapaw.ivexpo.com/uploads/1/3/2/3/132302872/melinusufagazix.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/1/0433/2178/6521/files/16402263603.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9167/2736/files/58625156520.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0291/2168/files/jumafatabagujegopusaguv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4933/7507/files/xoxotadosixevizifo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7496/8997/files/16307876701.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7663/2214/files/gewined.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/2449/9367/files/wasinevoxikosetedebiz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8484/1124/files/15854710346.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/0539/3571/files/gofuwukiloziwuzanumo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/3945/7431/files/zepup.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/3393/4496/files/20946333536.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0007/0307/files/92360024442.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7182/3267/files/rodebukedudolimurini.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/1386/4602/files/fuvewoxevep.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_off0000555c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x555C | 5580 bytes |
SHA-256: d48fd4a38ce979346411569b680b194497bc9cf3b5767d112ea91845122c7d89 |
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font_01_sfnt_off00006883.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6883 | 11032 bytes |
SHA-256: 388ec08a88dbba74e3d3384c9bf393f294fa4d175e639a60af5bf95d0ca4dd43 |
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