MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=libros+de+quimica+general+universitarios+pdf'. Another heuristic indicated a large PDF link farm, with the first URL being 'https://cdn.shopify.com/s/files/1/0434/6678/4932/files/best_android_casual_games_free.pdf'. The document body, though heavily obfuscated, also contains the malicious redirector URL. These findings suggest the primary purpose is to lure 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=libros+de+quimica+general+universitarios+pdf
- https://cdn.shopify.com/s/files/1/0434/6678/4932/files/best_android_casual_games_free.pdf
- https://cdn.shopify.com/s/files/1/0430/7343/7845/files/48926685794.pdf
- https://cdn.shopify.com/s/files/1/0431/7508/4193/files/tezipasofevufebu.pdf
- https://cdn.shopify.com/s/files/1/0432/3033/1047/files/semomebidisafe.pdf
- https://cdn.shopify.com/s/files/1/0428/7964/7903/files/faludagajuvugakopusotazo.pdf
- https://static.usrfiles.com/ugd/9e41f0_3f7e4ea90e394d6abda6c28737a23e32.pdf
- https://static.usrfiles.com/ugd/b8c837_57f22b90c1c349beb4dee70e8a6f115d.pdf
- https://static.usrfiles.com/ugd/b85eb0_41fa480755ff491294374b2884ce9ed2.pdf
- https://static.usrfiles.com/ugd/e5a943_686679cf1ec549a8a0eb3e9fed7532b6.pdf
- https://static.usrfiles.com/ugd/cf79db_bfbac7ed99414313810cb3a539d41e0c.pdf
- https://cdn.shopify.com/s/files/1/0429/2460/5599/files/zakuxobedab.pdf
- https://cdn.shopify.com/s/files/1/0440/2076/0734/files/mediroxerinotudusenubeban.pdf
- https://cdn.shopify.com/s/files/1/0433/3273/1030/files/raretovodobadup.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_off0000ad94.binfc4d2c54847e0a850b2fced87fcc804be91b4dc8a7709c666d0268f0a8020a94 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAD94 | 5740 bytes |
font_01_sfnt_off0000c100.bin5654ff0cf42dc1d33880c7ae462b6cd2a371127d78020a7c779f9f7853c935e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC100 | 11644 bytes |
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