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 of which point to a link farm hosted on static.usrfiles.com. One of these links, https://ttraff.ru/wix?keyword=addition+word+problems+2nd+grade+worksheets, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to educational worksheets, suggesting a lure to trick users into clicking the malicious link.
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=addition+word+problems+2nd+grade+worksheets
- https://static.usrfiles.com/ugd/b910ae_11db386e404a44098f8ced57cca3077d.pdf
- https://static.usrfiles.com/ugd/b8c837_11b10c51d7214f03b9ec3cc31a395f1f.pdf
- https://static.usrfiles.com/ugd/dcfb95_8e9cedcfd6cf4dcd82e456fcc77d9f21.pdf
- https://static.usrfiles.com/ugd/04c368_fffe084c36e240ea99eee10217cfac76.pdf
- https://static.usrfiles.com/ugd/b8c837_8d6aea8c2aee497888f58e33595ee7da.pdf
- https://cdn.shopify.com/s/files/1/0430/3486/9921/files/transporter_the_series.pdf
- https://cdn.shopify.com/s/files/1/0434/7671/3637/files/roxuvipetatutaluxasulumav.pdf
- https://cdn.shopify.com/s/files/1/0432/2613/6743/files/esc_arterial_hypertension.pdf
- https://cdn.shopify.com/s/files/1/0432/3672/0798/files/wonderful_tonight_drum_sheet_music.pdf
- https://cdn.shopify.com/s/files/1/0439/7318/1598/files/dazegakuruxivugaw.pdf
- https://cdn.shopify.com/s/files/1/0434/1907/4712/files/agreements_opposed_to_public_policy.pdf
- https://static.usrfiles.com/ugd/b8c837_dabb7927e65f4899bdf36d9ed1eb8f3b.pdf
- https://static.usrfiles.com/ugd/9ff9b8_18ede5e38fe442c38f1105effa5726c9.pdf
- https://static.usrfiles.com/ugd/808d8c_e18c71b62bc546398aff9409011ca08e.pdf
- https://static.usrfiles.com/ugd/b8c837_20ffe5153bf840dda99856ec899bec2e.pdf
- https://static.usrfiles.com/ugd/b8c837_39f7dbe0cd854a7083df6d2543a5a8f0.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_off0000719f.bina6ebd92edd153d505287009bfdb5e782241e1c1356a45d5a5405ca3823a004d3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x719F | 5788 bytes |
font_01_sfnt_off00008538.bine43bae69b0f27a8de9d2f8d88cd571dd943f6130cb36ed9b50c6fbfc047763b6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8538 | 10364 bytes |
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