MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document contains a lure for an 'exam answer key' which, upon inspection, redirects to a known malicious URL. The document is structured as a link farm, with many embedded URLs pointing to various PDF files, likely to obscure the malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to harmful content.
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/wb?keyword=12th%20quarterly%20exam%20answer%20key%202019%20pdf In PDF document text
- http://files.montessorianakku.com/uploads/1/3/1/4/131483209/5075239.pdfIn PDF document text
- http://sofozebol.anneduffforeducation.com/uploads/1/3/1/0/131070493/wavepimakoxida_bevofinu_gadulegujab.pdfIn PDF document text
- http://devojan.segolilyschool.org/uploads/1/3/1/4/131407068/dde2ec0891.pdfIn PDF document text
- http://files.christopherfoxallphotography.com/uploads/1/3/2/6/132682040/4811752.pdfIn PDF document text
- http://files.jmurowing.com/uploads/1/3/2/3/132302716/8085882.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/1/0427/7246/3772/files/98062427829.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zozaweguxilamefawe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4651/0504/files/blood_hunter_orders.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0449/8564/7272/files/agricultural_science_grade_12_study_guide_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0446/5931/0745/files/alliteration_and_assonance_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4814/7867/files/mutip.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/8089/3084/files/70226755914.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7954/8580/files/4567790877.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6676/1120/files/rixoduxepoxiletonunod.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9517/8902/files/zomuzegupexavowak.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0451/3182/5317/files/dfinition_algorithme_informatique.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5788/8932/files/nibotavunij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5857/7064/files/1231228453.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_off000057ea.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x57EA | 6120 bytes |
SHA-256: 30411c7b1ca3e38b25f253ada7a2ccfb4b890a9eaad91e1b3458abeb8bbc704b |
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font_01_sfnt_off00006cad.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6CAD | 10220 bytes |
SHA-256: f1a727d5e1411a02b4562dc3ee39efdf6bd01ee5e1d44772a45e5580d729e4e3 |
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