MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL, 'https://ttraff.ru/pify?keyword=sabiston+textbook+of+cardiac+surgery+pdf', is flagged as malicious and appears to be part of an SEO link farm designed to lure users with seemingly legitimate content. The ML classifier also strongly indicated maliciousness.
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.ru/pify?keyword=sabiston+textbook+of+cardiac+surgery+pdf In PDF document text
- http://files.simuelconsulting.com/uploads/1/3/0/7/130738969/9ccc3924cd5.pdfIn PDF document text
- http://files.studiobdancecenter.org/uploads/1/3/1/8/131871970/20fc3209aaea7c.pdfIn PDF document text
- http://files.rachelmillercalligraphy.com/uploads/1/3/0/7/130739328/wemuzezetuze-godoxem-bafumadusudi.pdfIn PDF document text
- http://files.usemillennium.com/uploads/1/3/2/6/132682327/eae88421a34418.pdfIn PDF document text
- http://files.timelessvaca.com/uploads/1/3/0/8/130813364/rufix.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1967/2472/files/disawowabodu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7181/6358/files/40343972370.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9236/9823/files/51700698874.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5207/2086/files/22416543119.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3939/0872/files/adobe_indesign_trial.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9780/1375/files/30254965836.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4489/6917/files/32760632436.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/8482/3205/files/wapasagowepe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3590/1602/files/dynamic_array_c.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0444/4743/2871/files/facing_your_giants_max_lucado.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1837/0728/files/rimagatob.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8127/7342/files/58671758012.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000667a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x667A | 5768 bytes |
SHA-256: 4de6c99e78aa8150b69b525815a7864c30b5d6e864346e7af7da0802718c56f4 |
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font_01_sfnt_off00007a3c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7A3C | 10668 bytes |
SHA-256: d1bd65f2810862853d26022ead4404c9ced6110056513287a15802d31c9391ab |
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font_02_sfnt_off00009efe.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9EFE | 16204 bytes |
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15 |
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