MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and also references a large number of external PDF links, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to disguise malicious links within a seemingly legitimate document structure, aiming to redirect users to malicious sites.
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/wix?keyword=gotranscript+audio+test+answers+july+2019+pdf
- https://static.usrfiles.com/ugd/5cd33b_04f276d6f11f4128a38c63a1c65b937a.pdf
- https://static.usrfiles.com/ugd/a86d68_34e9ab2ea61740ac9df1a16d4944e322.pdf
- https://static.usrfiles.com/ugd/2486b5_1ad56a2a13a14a38998a4a399f24b2a7.pdf
- https://static.usrfiles.com/ugd/b8c837_fae4bc71b46c44b0aae9655d242d7e39.pdf
- https://static.usrfiles.com/ugd/f09a9d_24579a60eee043818d0b3dcc0385eb76.pdf
- https://static.usrfiles.com/ugd/b8c837_d8405a7a87514521a8b6e3a1fa891439.pdf
- https://static.usrfiles.com/ugd/4c3d6a_393a09262bc14750be5e5f2e4ecc3455.pdf
- https://cdn.shopify.com/s/files/1/0427/6230/5702/files/98490066051.pdf
- https://cdn.shopify.com/s/files/1/0431/8704/4510/files/99821648032.pdf
- https://static.usrfiles.com/ugd/b8c837_2dc5fa4aef0642abb8432000f11f9378.pdf
- https://static.usrfiles.com/ugd/5b9365_f4f3f4e0894040efac867adbfbd75894.pdf
- https://static.usrfiles.com/ugd/c345b0_9f749b798da7472f8eeccd32a8783b41.pdf
- https://static.usrfiles.com/ugd/008e52_73782efe3983408aa56df565d62f103a.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/
- https://static.usrfiles.com/ugd/008e52_73
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000063af.binc17a2b7c7f5dea82fff7247d4318b3a2c7c06b02fe3fbc713266c4a601b073d4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x63AF | 5932 bytes |
font_01_sfnt_off00007813.bin82600adee1d52daa55b28ac9d4a67b9f989fb4f76397f566e9efd7d3f1a2754a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7813 | 10884 bytes |
font_02_sfnt_off00009d1e.binc4441e48b2f68604838bd51e3092d1355fc6ad73caca962ec91191dcf11ac5c9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9D1E | 16224 bytes |
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