MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 Malicious Link
T1059.001 PowerShell
The PDF contains numerous links to external resources, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'estatistica inferencial exercicios resolvidos pdf' and a URL that aligns with the malicious redirector heuristic. The ML classifier strongly indicates maliciousness, and the overall structure suggests a link farm or phishing attempt.
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/wb?keyword=estatistica%20inferencial%20exercicios%20resolvidos%20pdf In PDF document text
- http://tonibete.swindonmanandvan.com/uploads/1/3/2/8/132815094/1260253.pdfIn PDF document text
- http://files.robspechtart.com/uploads/1/3/0/8/130814516/govabul_pokesoxutoreve_fafavevukeb_zidawevopunu.pdfIn PDF document text
- http://files.newcastlenetworkinggroup.com/uploads/1/3/0/8/130813887/90ec99c3.pdfIn PDF document text
- http://files.peggythomasclayart.com/uploads/1/3/0/7/130739892/9140733.pdfIn PDF document text
- http://files.isaakthetutor.com/uploads/1/3/1/8/131856134/8308844.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0433/7847/5162/files/open_hosts_file.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5824/9380/files/fesazavugepimigokediv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0447/9077/5965/files/wadosavajonubefuganol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/1488/1433/files/sogow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0734/3779/files/wulelig.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8260/3927/files/79259096508.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/7646/6328/files/stop_nox_from_installing_random_apps.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8619/2546/files/46250148095.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4117/7248/files/minineb.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6427/0743/files/44831900788.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8837/9032/files/lezuxefifijefe.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000a405.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA405 | 2824 bytes |
SHA-256: b7be74fbb2d36237338c84d0313027823be61b2741340031ca04dfcc2bbd3de3 |
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font_01_sfnt_off0000afa1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAFA1 | 5236 bytes |
SHA-256: 97bf173d30656f728df9d44a8a46b01b9a4725b80c6cf6d6140f0f8af0c30bc3 |
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font_02_sfnt_off0000c17e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC17E | 17076 bytes |
SHA-256: de120003ef7f95cc9267b41faf91d5159ee196d319683e3c47bc661345079539 |
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font_03_sfnt_off0000f481.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF481 | 16084 bytes |
SHA-256: 9f6d3003b281a24936fb23404abbb72d950ee518ad195daffe5a9caf4f0e74b5 |
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