MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.cc/pify?keyword=silent+letters+exercises+pdf, is identified as a known malicious redirector. The document body itself is heavily obfuscated and appears to be a lure, likely intended to trick users into clicking the links and visiting potentially malicious sites. The ML classifier strongly supports the malicious verdict.
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=silent+letters+exercises+pdf In PDF document text
- http://files.nscwritingcenter.com/uploads/1/3/0/9/130969206/lifuxenogim.pdfIn PDF document text
- http://tunil.lcooperillustration.com/uploads/1/3/0/7/130739751/6de52b4e53f3776.pdfIn PDF document text
- http://fimoro.pahasapagrotto.org/uploads/1/3/0/8/130874365/lemowosozexirapalala.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/1/0433/0127/3758/files/anthony_giddens_runaway_world.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3449/9493/files/fijafitopusoroke.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2449/8343/files/73759687308.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0744/2072/files/86960484934.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4443/7142/files/xexizokesavevuwuderozekuw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0799/1208/files/dotuvup.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1384/8731/files/82409637822.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7567/4014/files/sativuvibu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6243/5745/files/49241832877.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8739/6004/files/advanced_piano_christmas_music.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/1442/2687/files/junabuserifezenide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/3056/1447/files/philosophical_gourmet_report.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2875/0241/files/ruxofudezejoveseki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/9052/3813/files/wevefemowidoxorigevizo.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_off0000464e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x464E | 5112 bytes |
SHA-256: d39b88d1c66439a1bd539931bd70a59dbd65ec7638179e8fe7e829c4ce3bf54e |
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font_01_sfnt_off000057bc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x57BC | 9500 bytes |
SHA-256: b4ca4f7b6c541efef32379d04e0748445e29238ddb719596a84e6dfb36bcca8d |
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