MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body itself is heavily obfuscated but contains the malicious redirector URL and numerous other links to external PDF files, suggesting a link farm or distribution mechanism. No scripts were extracted, limiting the analysis of direct execution vectors.
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=casella+and+berger In PDF document text
- http://files.spraguescience.com/uploads/1/3/1/4/131437044/280413b67.pdfIn PDF document text
- http://files.socceriqeducation.com/uploads/1/3/1/6/131637374/a990ea207a8378.pdfIn PDF document text
- http://files.learninggenerously.com/uploads/1/3/2/7/132740480/fenadeji-palonapomeb.pdfIn PDF document text
- http://files.biomedlabs.org/uploads/1/3/0/8/130814124/tavagovoga.pdfIn PDF document text
- http://files.globalisationandcities.com/uploads/1/3/1/6/131607174/jilaxafufusekiw.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/1/0432/5202/3458/files/xivagadezifanojo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9141/8518/files/waxadineritu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6843/2288/files/nesovepiwivawav.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/6434/5247/files/2564416252.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/3590/2631/files/lubepuxawebibunis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3258/4098/files/85499410024.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5769/2320/files/increase_size_of_field_drupal.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5671/6183/files/mixenexon.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8678/2369/files/9925161665.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1119/4525/files/litusapodiku.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/0729/6163/files/jogufufow.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_off00005a1e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5A1E | 5040 bytes |
SHA-256: 4ee02fdfd0313fd24106a3390b31756577df4ede88b9ab195ff86bc438a37bb5 |
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font_01_sfnt_off00006b41.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6B41 | 10456 bytes |
SHA-256: 14a82e07207b6d98a5733dbcef7fe137609c31ff0779cb1166b08596317c3149 |
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