MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body contains text that appears to be a lure, possibly related to a 'Yellowhammer report', and includes a URL that redirects to a malicious site. The primary attack pattern involves redirecting users to malicious infrastructure through a link farm.
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=yellowhammer+report+in+full
- http://files.coffsharbourroofing.com/uploads/1/3/1/3/131398605/3727926.pdf
- http://files.fablabav.com/uploads/1/3/1/6/131607810/jibasirujup.pdf
- http://pidozaweb.amodelbuiltonfaith.org/uploads/1/3/1/0/131071157/3156078.pdf
- https://cdn.shopify.com/s/files/1/0428/0070/9791/files/5352145004.pdf
- https://cdn.shopify.com/s/files/1/0433/7224/9251/files/international_business_strategy_management_and_the_new_realities_download.pdf
- https://cdn.shopify.com/s/files/1/0429/8683/2035/files/42439867946.pdf
- https://cdn.shopify.com/s/files/1/0430/9054/2753/files/6423028096.pdf
- https://cdn.shopify.com/s/files/1/0433/7182/3267/files/rodebukedudolimurini.pdf
- https://cdn.shopify.com/s/files/1/0429/5829/1093/files/43600105936.pdf
- https://cdn.shopify.com/s/files/1/0437/9725/0210/files/87327865774.pdf
- https://cdn.shopify.com/s/files/1/0435/2288/3735/files/antibiotic_resistance_research_paper.pdf
- https://cdn.shopify.com/s/files/1/0428/7243/8947/files/4004433216.pdf
- https://cdn.shopify.com/s/files/1/0437/5180/0981/files/maxenomegowafurumiji.pdf
- https://cdn.shopify.com/s/files/1/0428/7194/7423/files/99173286810.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.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/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000831f.bin8290961826c1a31b31a80435bec3e946113ef1e80ee9f41fc28a05ac872de18c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x831F | 5016 bytes |
font_01_sfnt_off0000941d.bindf2d46e015a6a93f7a6e7809fb2d08dc84f969bacfbd86af5d4b13088ada8610 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x941D | 10364 bytes |
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