MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
This PDF document 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.link/wix?keyword=irregular+polygon+worksheets+for+3rd+grade, is identified as a malicious redirector. The document's content appears to be a lure, using educational keywords to entice users to click the malicious link. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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.link/wix?keyword=irregular+polygon+worksheets+for+3rd+grade In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://static.usrfiles.com/ugd/828753_43e3348df7c64e0ca1f03bb2d5b1638e.pdfIn PDF document text
- https://static.usrfiles.com/ugd/6812d7_b50253a219bb4035b5a68553fe03f6a2.pdfIn PDF document text
- https://static.usrfiles.com/ugd/7820d0_65d5efc6b8214684bcf4a84647679103.pdfIn PDF document text
- https://static.usrfiles.com/ugd/d5cf39_b3da30cdff9a4b51a52a8d198e706367.pdfIn PDF document text
- https://static.usrfiles.com/ugd/6e3131_1e4682a265a0418e8f9ed99115f35408.pdfIn PDF document text
- https://static.usrfiles.com/ugd/0bfb20_5e9b0833bd454166aef042b23ac3ea11.pdfIn PDF document text
- https://static.usrfiles.com/ugd/7921d2_85119425eef8404f93b7d51c9c71e003.pdfIn PDF document text
- https://static.usrfiles.com/ugd/d902bb_e643301a60034115893a40fc11753706.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9802/1793/files/sheet_metal_forming_process_nptel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7487/9641/files/37392315460.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9763/7535/files/kurorutobabelufurozunud.pdfIn PDF document text
- https://static.usrfiles.com/ugd/8bf3fc_87cf81cdedf24d44901eb456b3f6082e.pdfIn PDF document text
- https://static.usrfiles.com/ugd/4a6c57_dad510f8b2864716b9444ac8ea6bed35.pdfIn PDF document text
- https://static.usrfiles.com/ugd/55cc32_d72a8969225d4cc4a9fba12496871b13.pdfIn PDF document text
- https://static.usrfiles.com/ugd/d6b5da_001c7afff2f94454a7012a298326db77.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000054b4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x54B4 | 5496 bytes |
SHA-256: 434c2e16964ca6dc6eecb078a14f66aa98f25b3624832d20f71d90546da6181c |
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font_01_sfnt_off00006771.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6771 | 9900 bytes |
SHA-256: f5849d83ee11fdd3df8f0264b6fcb51acc2d6c43b83906a8a4d942f76cf9fbfe |
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font_02_sfnt_off0000894f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x894F | 16116 bytes |
SHA-256: 586fd2d47d7ef655ac8fcedaf3a17ac43b55ee34544d24df6525aba8b365c669 |
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font_03_sfnt_off00009e28.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9E28 | 4324 bytes |
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333 |
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