MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify?keyword=nabucco+libretto+pdf. Additionally, it features a large number of embedded PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.
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 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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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=nabucco+libretto+pdf
- http://files.kingtonfoodfestival.co.uk/uploads/1/3/1/4/131453170/nojejixorigata.pdf
- http://files.hrcm.org/uploads/1/3/1/6/131607029/71f926a7.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/8334/9657/files/how_to_speak_english_fluently_book.pdf
- https://cdn.shopify.com/s/files/1/0435/2134/3647/files/16691509150.pdf
- https://cdn.shopify.com/s/files/1/0430/7196/3296/files/83645724766.pdf
- https://cdn.shopify.com/s/files/1/0439/1924/5467/files/mausam_ki_baarish_song_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0429/2093/5590/files/ripup.pdf
- https://cdn.shopify.com/s/files/1/0433/3296/0409/files/princeton_architectural_press_submission_guidelines.pdf
- https://cdn.shopify.com/s/files/1/0436/2646/3392/files/74564921117.pdf
- https://cdn.shopify.com/s/files/1/0431/9684/2142/files/41847152252.pdf
- https://cdn.shopify.com/s/files/1/0428/0123/4076/files/38280150713.pdf
- https://cdn.shopify.com/s/files/1/0435/6043/5873/files/regelusaxu.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ad22.bincb190937900308917e160d73bd9426dc7b8eee9d6012e8bf81d942f275c9fa1d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAD22 | 5080 bytes |
font_01_sfnt_off0000be6f.binc3d1d36756aaf62d69a27fd6c6b6e10acde17cee8919ea4bee4664661548bb27 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBE6F | 10172 bytes |
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