MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a large number of embedded links, many of which are designed to appear as legitimate book downloads but ultimately redirect to a known malicious URL. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to manipulate search results or distribute malicious content. The primary malicious IOC is the redirector URL.
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=robert+bringhurst+elements+of+typographic+style+pdf
- http://files.bartholomaeusofsalerno.org/uploads/1/3/0/7/130739232/jomis.pdf
- http://files.podunkideas.com/uploads/1/3/0/7/130776483/fafozelaguk.pdf
- http://files.cowboys4heroes.com/uploads/1/3/1/6/131607063/2b96a3b6ee1dce.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/5340/8675/files/tezewafi.pdf
- https://cdn.shopify.com/s/files/1/0427/7967/2735/files/76776899522.pdf
- https://cdn.shopify.com/s/files/1/0437/4567/3377/files/50717810417.pdf
- https://cdn.shopify.com/s/files/1/0430/0147/9321/files/rejoma.pdf
- https://cdn.shopify.com/s/files/1/0428/6146/1670/files/nepezazabilediv.pdf
- https://cdn.shopify.com/s/files/1/0437/5311/1704/files/learn_java_8_in_21_days.pdf
- https://cdn.shopify.com/s/files/1/0449/3144/9000/files/fury_warrior_trinkets.pdf
- https://cdn.shopify.com/s/files/1/0434/6665/3858/files/jvc_remote_control.pdf
- https://cdn.shopify.com/s/files/1/0440/1093/0341/files/axis_bank_savings_account_closure_form.pdf
- https://cdn.shopify.com/s/files/1/0455/7878/0837/files/beginnings_and_beyond.pdf
- https://cdn.shopify.com/s/files/1/0428/6870/3398/files/cyanobacteria_download.pdf
- https://cdn.shopify.com/s/files/1/0428/7981/1750/files/nujizegefobewaxivoze.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_off000084c8.bin15223036910375768fb75c71963f787589789492ba1102361ec2d6ea323b2f70 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x84C8 | 5816 bytes |
font_01_sfnt_off0000986c.binc8c8b418215c8cd0b4d8cb3ab84565a28b3b4117d45723e68a217e9f2ee644d3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x986C | 10096 bytes |
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