MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to educational worksheets. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a deliberate attempt to host a large number of external links, likely for SEO manipulation or to obscure the final malicious destination.
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=algebra+cross+multiplication+worksheets
- http://puvubu.drmldr.com/uploads/1/3/1/3/131379678/butatuneforajora.pdf
- http://files.losaldrama.org/uploads/1/3/2/6/132682790/dugagabes-mokegapevujak.pdf
- https://cdn.shopify.com/s/files/1/0435/5801/1035/files/bartleby_o_escrivo_download.pdf
- https://cdn.shopify.com/s/files/1/0432/0677/0849/files/suvibafoxixibukajati.pdf
- https://cdn.shopify.com/s/files/1/0431/7026/7291/files/resesobudivijufakaxelov.pdf
- https://cdn.shopify.com/s/files/1/0428/4248/8998/files/1858239590.pdf
- https://cdn.shopify.com/s/files/1/0454/4895/4006/files/17728902604.pdf
- https://cdn.shopify.com/s/files/1/0434/5017/1554/files/31217857531.pdf
- https://cdn.shopify.com/s/files/1/0435/2779/8944/files/roped.pdf
- https://cdn.shopify.com/s/files/1/0433/4256/1433/files/angularjs_viewer_demo.pdf
- https://cdn.shopify.com/s/files/1/0433/0763/0747/files/barcode_attendance_system.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.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_off000058e2.bin5cf6b8127ddd25009a65e4e57632c7b0de20aeabca5457fc416a673f31b4adc8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x58E2 | 5632 bytes |
font_01_sfnt_off00006be6.bin92112cdc24b9c3f2fb412f1d5658c5dc19b6f69388eef000f02d893ab16f4d38 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6BE6 | 14196 bytes |
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