MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a lure for a free textbook download, which is a common social engineering tactic. It embeds multiple links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The ML classifier also strongly indicates maliciousness. The primary attack vector appears to be directing users to malicious content via a deceptive link.
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/wb?keyword=free%20download%20nelson%20textbook%20of%20pediatrics%2020th%20edition%20pdf In PDF document text
- http://files.treekangaroos.com/uploads/1/3/1/4/131483778/xoxel.pdfIn PDF document text
- http://files.elixirespressobar.com/uploads/1/3/0/8/130814205/9948b1ab73ae.pdfIn PDF document text
- http://files.3dpormexico.org/uploads/1/3/1/8/131871852/b3656ea8fff48.pdfIn PDF document text
- http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.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/1/0430/2602/2554/files/xafajam.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/5358/0437/files/nadagofov.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2526/7877/files/navaradon.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1338/1028/files/nifokepopagosugede.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/8861/8396/files/zolomuzuvori.pdfIn PDF document text
- https://merefipo.files.wordpress.com/2020/06/94525058393.pdfIn PDF document text
- https://jonaluzoj.files.wordpress.com/2020/07/gelafulizomixekalemawo.pdfIn PDF document text
- https://fizedetaz.files.wordpress.com/2020/06/20250201529.pdfIn PDF document text
- https://mijukuwojaw.files.wordpress.com/2020/06/xowagoroginowerupatepesa.pdfIn PDF document text
- https://wupefosa.files.wordpress.com/2020/06/lebanaputapewamewabukizib.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7173/3917/files/18759581487.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5310/4790/files/pukejasozubasavezinerad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7426/4981/files/65275394042.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5857/7046/files/wuforofabagijisexogija.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/9542/4165/files/vovebojaxisitokiwediki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.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_off00007262.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7262 | 5624 bytes |
SHA-256: 4899399a755314316f375de8bb7bdfb88991d79927486f6cfe5c2b3d66311dab |
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font_01_sfnt_off0000858e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x858E | 10800 bytes |
SHA-256: 24470a34ad0b81fec29512d5a6947e6a9e5e350d19463b534edca0ab3367d144 |
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