MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users searching for educational materials. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, indicating a link farm strategy. 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.com/wb?keyword=northstar%20building%20skills%20for%20the%20toefl%20ibt%20intermediate%20pdf%20download In PDF document text
- http://files.houndshangout.ca/uploads/1/3/1/4/131407761/2803822.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/1/0429/6232/1567/files/demed.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1791/9909/files/rogogituxodamudixel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8298/1281/files/82224915759.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4124/3814/files/jevifagizajolamosuxis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2504/6431/files/2020_calendar.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1618/2166/files/pajererakovube.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4166/0826/files/zulaxonizeguluzaxul.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/0372/2398/files/bositezaxewikagagelinipuz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4879/6309/files/ketifenefodalezurasip.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7259/4844/files/40730920964.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9702/2879/files/reliability_analysis_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6681/7696/files/71424944632.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5497/9477/files/matura_podstawowa_angielski_sownictwo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1024/4256/files/91834832105.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_off00004f19.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4F19 | 5720 bytes |
SHA-256: f91078c93928e92f82ac57e082ea3041dc7d100625cf685a62ac8a424756b29a |
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font_01_sfnt_off0000627d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x627D | 13196 bytes |
SHA-256: 5dbd37542caa23e9386b7462883099cc14e9fa60801a58b68f26cb26fb6741ff |
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font_02_sfnt_off0000890a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x890A | 16648 bytes |
SHA-256: d3099b04294705fbd98edf3ec0384a2ca2423171a7a91634e670a652ef97bb2b |
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