MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded links suggest a lure related to TOEFL test preparation, aiming to trick users into visiting the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.
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=toefl+test+preparation+guide+pdf
- http://files.arkansasquesters.com/uploads/1/3/2/8/132815004/2898574.pdf
- http://files.littlepieceofmyheart.com/uploads/1/3/0/7/130740517/aaef0f352ce451e.pdf
- http://files.mx.catalinapacificunderground.com/uploads/1/3/1/4/131406337/wipuwazofope.pdf
- https://cdn.shopify.com/s/files/1/0439/0925/1240/files/passione_canzone_napoletana_spartito.pdf
- https://cdn.shopify.com/s/files/1/0433/2729/1544/files/38299496568.pdf
- https://cdn.shopify.com/s/files/1/0436/0008/5160/files/62376389622.pdf
- https://cdn.shopify.com/s/files/1/0436/9950/3257/files/takoxawegovelotuzijugaz.pdf
- https://cdn.shopify.com/s/files/1/0431/7482/2043/files/petulaponewepolu.pdf
- https://cdn.shopify.com/s/files/1/0430/8012/2532/files/tixusug.pdf
- https://cdn.shopify.com/s/files/1/0433/5131/0488/files/reset_amazon_echo_dot.pdf
- https://cdn.shopify.com/s/files/1/0434/0776/9750/files/kujaxeweledis.pdf
- https://cdn.shopify.com/s/files/1/0430/3080/6679/files/60722404544.pdf
- https://cdn.shopify.com/s/files/1/0434/0681/9477/files/dudofajidafewobo.pdf
- https://cdn.shopify.com/s/files/1/0432/2652/9956/files/xupodepiriw.pdf
- https://cdn.shopify.com/s/files/1/0431/8806/0320/files/jotafagojalibuxotizo.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_off0000a4b0.bine071d868a28443d477d93e269572ab5f7f48d83de65d59e3a5eff773c07cbed8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA4B0 | 5160 bytes |
font_01_sfnt_off0000b64c.binfef96eb74b969e349a15c112afe87e5e0829bec6dbab0e94e129a65d665837ec |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB64C | 11036 bytes |
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