MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/wb?keyword=beyond%20the%20worksheet%20probability%20practice%20answers'. The document body, though heavily obfuscated, suggests a lure related to 'probability practice answers'. The ML classifier strongly indicates maliciousness, and the presence of many external PDF links points to a link farm or SEO manipulation tactic to distribute malicious content.
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=beyond%20the%20worksheet%20probability%20practice%20answers In PDF document text
- http://files.itslearningsupport.com/uploads/1/3/1/6/131636954/wotilubewexejaka.pdfIn PDF document text
- http://files.streetchurch.org.uk/uploads/1/3/1/3/131398093/patuzizoki_xefasusubu.pdfIn PDF document text
- http://files.phshalloffame.com/uploads/1/3/2/3/132302768/918ff.pdfIn PDF document text
- http://files.photosophy.co.uk/uploads/1/3/1/1/131164132/karoj_dozuj_wusikuno.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/1/0429/3813/8783/files/piwivibadujikubaxiragof.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6132/1634/files/24682940468.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8451/3440/files/17752739339.pdfIn PDF document text
- https://paxologon.files.wordpress.com/2020/07/legudalelasogoteni.pdfIn PDF document text
- https://lobofur.files.wordpress.com/2020/07/77328976479.pdfIn PDF document text
- https://mutobufew.files.wordpress.com/2020/07/tabagitejanisezu.pdfIn PDF document text
- https://wakinaga.files.wordpress.com/2020/07/buregigizogepevus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7328/2983/files/sufawewidepamenemukanum.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/1594/6911/files/39748174493.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7920/5013/files/votij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00008859.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8859 | 5396 bytes |
SHA-256: aadee1aa4a13ae0948ea31c7a38af5f53cd6550aaf91a3f6fccf04598d8d8fb9 |
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font_01_sfnt_off00009ab2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9AB2 | 11192 bytes |
SHA-256: 790c74cb23cfc15977f140495b04e4512a427f602f8a315469105aaa3429be28 |
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font_02_sfnt_off0000c111.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC111 | 16168 bytes |
SHA-256: 00670464757547084af28241a2e41e07f224db222154dc8d057e506215eab805 |
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