MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous links, including one to a known malicious redirector, disguised as a textbook download. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a link farm suggests an attempt to drive traffic to malicious or SEO-manipulated content. The document body itself contains obfuscated text and URLs, reinforcing the lure.
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.cc/pify?keyword=isc+class+11+biology+textbook+pdf+download In PDF document text
- http://lufut.stephenreavesart.com/uploads/1/3/1/3/131383297/65886158aef59d.pdfIn PDF document text
- http://files.rocmazeng.nl/uploads/1/3/2/6/132681954/4547190.pdfIn PDF document text
- http://files.saxenalab.com/uploads/1/3/1/4/131406785/1940361.pdfIn PDF document text
- http://files.commitment-health.com/uploads/1/3/0/9/130969751/wigitovote.pdfIn PDF document text
- http://files.loveyoubff.com/uploads/1/3/0/7/130739522/1014446.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/1/0431/0319/1193/files/30062416141.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5969/9109/files/12051708468.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/5719/8757/files/mixiroze.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1862/3896/files/27681892289.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2347/3560/files/71209491554.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5207/2088/files/vudezuzebe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4285/5319/files/caroline_myss_archetypes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5077/8275/files/43639474904.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15518423203.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4798/4027/files/parliamentary_debate_format.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8923/1000/files/josaxusevowagonifefo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9436/0735/files/xivaxanegewukudipuxit.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6054/3138/files/the_princess_and_the_frog_story.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6223/1201/files/xodasijes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4687/8882/files/gamojagigeliwerubomita.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_off000056c9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x56C9 | 5684 bytes |
SHA-256: 51e2fca570aa64af3d6ce42ddbb48215da0c5dc5b700dd67cb8bc1b2b17a53f1 |
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font_01_sfnt_off00006a50.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6A50 | 9968 bytes |
SHA-256: 0a666dc9814d758a1d746ac02d81c64b22b1b8bcb0afda06207e216b7c131f8b |
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