MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a CEFR English placement test. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The presence of a link farm suggests an attempt to improve search engine ranking for malicious content.
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=cefr+english+placement+test+pdf
- https://static.usrfiles.com/ugd/cc089a_a7e7bfc620d74b20863bd68451ed1ed6.pdf
- https://static.usrfiles.com/ugd/b98abb_40a06d9a0d7e44489d1dfc7bda7ebfba.pdf
- https://static.usrfiles.com/ugd/c33cdb_946b2112da4d417c99868919ceeac48c.pdf
- https://static.usrfiles.com/ugd/b98abb_9c34c900c92d431d8b41c902cc120461.pdf
- https://static.usrfiles.com/ugd/9cfd0a_f50ce692067441bda89db353eb9b399d.pdf
- https://cdn.shopify.com/s/files/1/0431/0705/7825/files/dr_babasaheb_ambedkar_in_marathi_download.pdf
- https://cdn.shopify.com/s/files/1/0431/2412/9952/files/java_untuk_minecraft_1._12_2.pdf
- https://cdn.shopify.com/s/files/1/0432/4596/1383/files/11846840871.pdf
- https://cdn.shopify.com/s/files/1/0434/1599/4529/files/jekegojes.pdf
- https://cdn.shopify.com/s/files/1/0431/0463/2992/files/77323305067.pdf
- https://cdn.shopify.com/s/files/1/0429/5072/1699/files/rekatufamujesilosajal.pdf
- https://cdn.shopify.com/s/files/1/0432/2961/0141/files/oppo_f11_specs_pinoy_techno_guide.pdf
- https://cdn.shopify.com/s/files/1/0438/3080/4637/files/turaforetesubiliw.pdf
- https://cdn.shopify.com/s/files/1/0434/7055/3250/files/traeger_wood_pellet_guide.pdf
- https://cdn.shopify.com/s/files/1/0436/4517/3910/files/58922533702.pdf
- https://cdn.shopify.com/s/files/1/0434/7713/9613/files/72876252314.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/b98abb_40a06d9a0d7e44489d1df
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00009d91.binbb9cb461f6ea009427ee3728a1fa2d94ffb802faa76e6bbd2b137bf0c9077c7b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9D91 | 5476 bytes |
font_01_sfnt_off0000b004.binb42a8a6912f509afb31f552437446be8b06dc96de7e9d2a352d1bd96b6000204 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB004 | 10840 bytes |
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