MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the string 'ctet exam syllabus 2020 pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a visual download button further supports a phishing or malware delivery attempt.
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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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=ctet+exam+syllabus+2020+pdf In PDF document text
- http://files.societyofsaints.net/uploads/1/3/0/7/130776180/5025743.pdfIn PDF document text
- http://files.ianbakst.com/uploads/1/3/0/9/130969686/9211495.pdfIn PDF document text
- http://xotumu.bywayfinearts.com/uploads/1/3/1/4/131483281/kifasidevibuned-bagugudok.pdfIn PDF document text
- http://files.liviajatoba.com/uploads/1/3/1/4/131454850/getor_mimusufapef.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8742/9785/files/english_alphabet_exercises_for_beginners.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/1289/7437/files/tumotubijabok.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/2998/7489/files/taxozufevuxekusaluremaw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2340/8032/files/alphabet_letters_writing_worksheets.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/5698/8311/files/surakoxutivusotara.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4293/0842/files/voxenanatajavalep.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7042/2180/files/59669059938.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/2159/6834/files/company_performance_analysis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7543/6698/files/69901713801.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/8705/3471/files/loliwirupubifovubirodebi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/1137/5267/files/1317785533.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8280/0542/files/jojezim.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000a45b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA45B | 5316 bytes |
SHA-256: 637417c447fed6eec77c48dc6680e96a0965178154ad09ebc06841daab4bd0ef |
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font_01_sfnt_off0000b685.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB685 | 10768 bytes |
SHA-256: 5cb5ae7c6986c2c567fcd6a613b67b6dd38c59cd17fbd91a5fe72a6ad50da0ff |
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font_02_sfnt_off0000db0b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDB0B | 4324 bytes |
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333 |
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font_03_sfnt_off0000e90c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE90C | 6128 bytes |
SHA-256: 19b02b7b9aa49f51bab89e48fac88df4f629e7c62dd35615a3c7ee3c0110e958 |
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