MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary link, 'https://ttraff.cc/pify?keyword=nstu+admission+circular+pdf+2020+20', is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Nstu admission circular pdf 2020 20', suggesting a lure to attract users interested in this topic. The presence of numerous external links, many hosted on Shopify, points to a link farm or SEO poisoning tactic to drive traffic to malicious sites.
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=nstu+admission+circular+pdf+2020+20 In PDF document text
- http://files.kravmaga-tokyo.com/uploads/1/3/1/8/131871419/xigulenaxi-kavebizidilebo-zotofutekibize-pefuxafuvimur.pdfIn PDF document text
- http://files.dejaliyah.com/uploads/1/3/0/8/130873951/ac541c.pdfIn PDF document text
- http://files.writingbeyondmargins.com/uploads/1/3/1/4/131438629/d5812f29761d54.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/1/0431/1459/4464/files/dikuriwurenonuwisivedatu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/8000/0423/files/23503506544.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1745/3211/files/sasazederajudu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7677/9174/files/51197736839.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7848/3096/files/17824999191.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7661/6353/files/xasebepadogofubub.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/3569/5016/files/6954681225.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6518/0321/files/bumetodalizipadedef.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0079/9140/files/sifitaroxowubimolokug.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8152/2599/files/18155096391.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4853/3142/files/manedezesopiwebedugeko.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4430/5056/files/88066202187.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7918/8118/files/zedutunow.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006edd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6EDD | 5308 bytes |
SHA-256: 5a45f6905430f71d78fb9344c0e883c1b0efa9a9f227374d0ff4968958d4bc1f |
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font_01_sfnt_off000080c1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x80C1 | 7552 bytes |
SHA-256: 1e439db43801e495adc14bc9016295e2dcc2435002a5c608ef06ddb5a1419766 |
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font_02_sfnt_off00009978.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9978 | 10372 bytes |
SHA-256: 3399ab802cda26561f762de85fb09b5b8a1d0725898cfb3e8e10df0ec58b9301 |
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