MALICIOUS
254
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF contains a lure promising textbook answers, directing users to a suspicious URL (https://ttraff.club/wix?keyword=aqa+chemistry+gcse+oxford+textbook+answers) which is flagged as a malicious redirector. The document also contains a large number of links to external PDFs, suggesting a link farm or SEO manipulation tactic. The presence of a browser installation lure and a callback phishing lure further indicates malicious intent, likely to trick users into downloading further malware or divulging credentials.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 7
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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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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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.club/wix?keyword=aqa+chemistry+gcse+oxford+textbook+answers In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://static.usrfiles.com/ugd/221eaa_dc92df53a1b24a5e9a59e7c8bba468fa.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_e7e32b66f6294d6b98eaf0221bf5f332.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_0d364dab46e24a209039d58dd30071b8.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5322/7936/files/rufixibek.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/3468/0216/files/89664555623.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0441/0392/5912/files/xubidete.pdfIn PDF document text
- https://static.usrfiles.com/ugd/2ddd39_ca0270013cc84a06838e3c3cd0d1a54a.pdfIn PDF document text
- https://static.usrfiles.com/ugd/2f8cea_5a0f65dc5aec446cb65fd5f76e7da5e2.pdfIn PDF document text
- https://static.usrfiles.com/ugd/cfbfd2_bccf89ba61c24bf7aec35c586b076f63.pdfIn PDF document text
- https://static.usrfiles.com/ugd/f4de5e_133d7ea96910402a9cb2a2edc2f08aaa.pdfIn PDF document text
- https://static.usrfiles.com/ugd/c618e9_f6302a9143084b04aec6bea4a5128121.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/1695/1704/files/vofimuwamijenafa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0449/9403/5880/files/august_2019_current_affairs_telugu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0891/7657/files/17258272943.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9468/8423/files/zozodapo.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
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005f49.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5F49 | 5984 bytes |
SHA-256: 3c97935b698451308a5cb8c0eaa18423eeb51c73700eec7a807f08b1eca5ff77 |
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font_01_sfnt_off00007399.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7399 | 10588 bytes |
SHA-256: edb5855253d91e23f5a63854932899c5b320d94c9462d9e3bb2752c7f9fcce97 |
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