MALICIOUS
234
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a mass external PDF link farm, with many links pointing to SEO-optimized URLs that redirect to potentially malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.ru', which is used here to lure users with the pretext of downloading educational materials. The ML classifier strongly indicates maliciousness.
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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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=adverbs+worksheets+for+6th+grade In PDF document text
- http://files.blue-river-vermont.com/uploads/1/3/2/7/132712116/513f61d10de22.pdfIn PDF document text
- http://files.ihotispolis.com/uploads/1/3/1/6/131637309/1099949.pdfIn PDF document text
- http://files.truckelele.com/uploads/1/3/1/4/131438312/suvepe.pdfIn PDF document text
- http://files.creativenationnonprofitcorporation.com/uploads/1/3/0/7/130740242/4552228.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/1/0433/0687/7080/files/degejuwetisagemudow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1089/9624/files/fikifesiwukedusuravu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6327/9767/files/familojufujuwibopunixima.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3409/9362/files/15425068981.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8981/3909/files/ruwose.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4994/2176/files/roderofofefexumu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/9032/2342/files/48818492621.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9754/7157/files/2134835119.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3748/2405/files/34305844583.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/6244/2646/files/fobiwasurow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/3579/4327/files/81545262520.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6686/0455/files/guxidasuxirivipufazafowu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/0491/2031/files/67906473415.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_off00007204.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7204 | 5272 bytes |
SHA-256: 92df98ccd183bbde750b67545697616b0b6f8c937486cff7f32c64371929366c |
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font_01_sfnt_off00008413.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8413 | 10072 bytes |
SHA-256: f4eb353e3e4e32e33f6a1593e33e4cf9a61b2d2d9f6dab718b4484de389444c8 |
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