MALICIOUS
152
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 'https://ttraff.cc/wix?keyword=examen+matematicas+1+bachillerato+ci'. The document body, though heavily obfuscated, also contains this URL and numerous other links to static.usrfiles.com, suggesting a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a link embedded within the document.
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.cc/wix?keyword=examen+matematicas+1+bachillerato+ci
- https://static.usrfiles.com/ugd/b8c837_78dc4acaef3a41d4bac33137316ff669.pdf
- https://static.usrfiles.com/ugd/857e61_817c9ba1047948d5b3904ce46127f88a.pdf
- https://static.usrfiles.com/ugd/9c43ec_7ea98b230f584e4882327402ab5e988b.pdf
- https://static.usrfiles.com/ugd/12f4eb_09b3da9683da43c5b077014515bbf9a9.pdf
- https://static.usrfiles.com/ugd/b8c837_90b82dd3c4f5440cb9f5d1adc5df0bd1.pdf
- https://static.usrfiles.com/ugd/822ecd_31d7a61586964f31bf761d1169c6d163.pdf
- https://static.usrfiles.com/ugd/df4650_0abf960924304a91b23c984e80abc47e.pdf
- https://static.usrfiles.com/ugd/e2c6c1_58518293b92049f8b8f923cbf6e79308.pdf
- https://static.usrfiles.com/ugd/493135_3c83c9215ca649aea4437287cb4b60e7.pdf
- https://static.usrfiles.com/ugd/c7ef1a_bc5c12fe5066407ebd3aac74012de626.pdf
- https://cdn.shopify.com/s/files/1/0431/8075/3058/files/5341357801.pdf
- https://cdn.shopify.com/s/files/1/0440/1509/1870/files/bachelor_party_invitation_cards_templates.pdf
- https://cdn.shopify.com/s/files/1/0428/4783/0183/files/ketevusipojosa.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_off000048a5.bina65b0271d2a6f45532907011f859ef80548e02a84b19a04cd3922e13aba4486d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x48A5 | 5044 bytes |
font_01_sfnt_off00005997.bin7bedb474f4bda2aa05cb5473673427f3f67ed389c5fe0625564c5752a5377085 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5997 | 10264 bytes |
font_02_sfnt_off00007b2e.bina542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7B2E | 4324 bytes |
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