MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'chemistry textbook online pdf' and includes the malicious URL. This suggests a social engineering attack aiming to trick users into visiting a malicious site, likely for further payload delivery or credential harvesting. The presence of a 'download button' heuristic further supports this lure-based attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=chemistry+textbook+online+pdf In PDF document text
- http://files.pandorascollective.com/uploads/1/3/1/4/131452958/7668435.pdfIn PDF document text
- http://files.mrchriswells.com/uploads/1/3/1/8/131871740/wupusiwumomur_pefadonuf_rasowod_lefan.pdfIn PDF document text
- http://files.safedart.info/uploads/1/3/0/7/130738534/4627335.pdfIn PDF document text
- http://files.carsandcrochet.com/uploads/1/3/0/9/130969220/duxizexat-bukepasijusitu.pdfIn PDF document text
- http://files.ganglionsoftware.com/uploads/1/3/2/3/132302923/wibejilet_senebijodon_bedatijiw_dipekapom.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/1/0433/9613/7111/files/13533293228.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1382/3909/files/75081253769.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9634/2695/files/56185151826.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/0879/3510/files/vefovekonunufumerilifani.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4285/6344/files/93789206116.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8188/3047/files/robert_bryndza_cold_blood.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8406/2622/files/categorical_syllogism_venn_diagram.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4852/5206/files/jotok.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5956/0094/files/49511574363.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0532/1109/files/fozusimudibakodisuxuju.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7431/3622/files/data_structures_and_algorithms_in_c_wiley.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0927/7095/files/62608288346.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/1792/7837/files/pasitod.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_off00008dd5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8DD5 | 5348 bytes |
SHA-256: 574097ff1a81cb4f283967c41c8fc28adc9cee0ffc4d3a779ef751f600dcbbdc |
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font_01_sfnt_off00009fdb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9FDB | 10812 bytes |
SHA-256: 78d2dee34adf354844b1345541c8229cd58bd5fe3a6783320d31415300ed3fca |
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