MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Cambridge fce use of english pdf' and the malicious URL, suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates an attempt to create a link farm for SEO poisoning or to distribute malicious content. The ML classifier also strongly indicated maliciousness.
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.cc/pify?keyword=cambridge+fce+use+of+english+pdf
- http://files.chads-w.com/uploads/1/3/1/3/131398253/9dd680a8f.pdf
- http://rezoxor.bensonbuffstreator.com/uploads/1/3/0/7/130776167/130727.pdf
- http://wifin.rabbitresidence.org.uk/uploads/1/3/1/4/131406717/sibezakekegipip.pdf
- http://files.kaseimart.com/uploads/1/3/0/9/130969525/5dee16.pdf
- https://cdn.shopify.com/s/files/1/0431/3815/4653/files/8262132220.pdf
- https://cdn.shopify.com/s/files/1/0430/3477/1610/files/gigabyte_motherboard_manual.pdf
- https://cdn.shopify.com/s/files/1/0431/0653/3525/files/55123891328.pdf
- https://cdn.shopify.com/s/files/1/0437/8152/1560/files/53915640501.pdf
- https://cdn.shopify.com/s/files/1/0438/5013/7760/files/53870503169.pdf
- https://cdn.shopify.com/s/files/1/0433/3142/0319/files/emotional_quotient_inventory_test_free.pdf
- https://cdn.shopify.com/s/files/1/0434/5082/6919/files/arabidopsis_thaliana_as_model_organism.pdf
- https://cdn.shopify.com/s/files/1/0438/3932/4325/files/cycling_jersey_template.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_off0000504a.binb9a87f4258d8df7bd4cfeb2085697603736324696b7d783750bf28b675b3c059 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x504A | 5612 bytes |
font_01_sfnt_off0000632e.bin76fd432db47f3e3ce4f4095f6921cc2071abef1fac4fcce7c41f92c7dca25a97 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x632E | 9988 bytes |
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