static\PDF\web\viewer.js

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// 自定义搜索关键词----------------------------------------
this.searchKeywords = keyword => {if (typeof PDFViewerApplication !== 'undefined') {PDFViewerApplication.eventBus.dispatch('find', {query: keyword,caseSensitive: false,highlightAll: true,findPrevious: true});}
}

static\PDF\web\viewer.js

1261行左右 

// 高亮显示N个关键词----------------------------------------
var keywords = new URL(decodeURIComponent(location)).searchParams.get('keywords');//获取关键词数组
if (keywords && keywords !== 'undefi