MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many pointing to PDF files hosted on external sites, characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.ru/wix. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains what appears to be a link to the same redirector.
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=introduction+oral+brevet
- https://cdn.shopify.com/s/files/1/0437/3685/8773/files/reddit_mtg_arena_codes.pdf
- https://cdn.shopify.com/s/files/1/0431/7711/5810/files/89191373879.pdf
- https://cdn.shopify.com/s/files/1/0434/4155/3575/files/petiwuda.pdf
- https://static.usrfiles.com/ugd/96768c_f9fb85fb00054afa90d9be46f6927714.pdf
- https://static.usrfiles.com/ugd/49be48_7a68a357be4c4294bddb4a12d3550038.pdf
- https://static.usrfiles.com/ugd/b8c837_d5c2cf93c6d043be8a06f2c6d6083b17.pdf
- https://static.usrfiles.com/ugd/b8c837_9a07ca46983945c9a32d91639ec6db3f.pdf
- https://static.usrfiles.com/ugd/7f929b_3f54238f17e743e5babe3b93a1042719.pdf
- https://static.usrfiles.com/ugd/f96b02_45fa687a1514433ba65bd5b6944d22da.pdf
- https://static.usrfiles.com/ugd/b8c837_15b2830db5804f10a4d84a83cd59a3a4.pdf
- https://static.usrfiles.com/ugd/79cb75_f3709566ddfa4942a27ad4c5d98157b7.pdf
- https://static.usrfiles.com/ugd/b8c837_4d9209eeff2e4894aded3050dffe764c.pdf
- https://static.usrfiles.com/ugd/724fb5_34b9d6d05824473d99eccfc5d4b2f868.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005b60.binbe175b9f09a9c9f0138fe4c2273392f322cdb9cb905f98e95c12f43971dd98b7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5B60 | 4776 bytes |
font_01_sfnt_off00006b9c.bin3c41068c706e12a4586a85ac01ae5fcec91534b2087a27e5f5c94b951f3b5b3a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6B9C | 9876 bytes |
font_02_sfnt_off00008d68.bin05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8D68 | 4324 bytes |
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