Is Alerta de ofertas e descontos safe?

// script.js line 98 — the wrapper host, built from the page's own protocolvar url_estrutura = document.location.protocol + "//descontosofertas.com.br/";// script.js line 6 — writes a cookie on the CURRENT page's domain.// Note: lngDias is named "days" but is multiplied by 300 * 1000 ms,// so the argument 25 below yields 25 * 300s = 7500s = 2 hours 5 minutes.function GerarCookie(strCookie, strValor, lngDias) {  var dtmData = new Date();  if (lngDias) {    dtmData.setTime(dtmData.getTime() + (lngDias * 300 * 1000));    var strExpires = "; expires=" + dtmData.toGMTString();  } else {    var strExpires = "";  }  document.cookie = strCookie + "=" + strValor + strExpires + "; path=/";}// script.js line 7 — returns the cookie value, or null if it is not set.function LerCookie(strCookie) {  var strNomeIgual = strCookie + "=";  var arrCookies = document.cookie.split(';');  for (var i = 0; i < arrCookies.length; i++) {    var strValorCookie = arrCookies[i];    while (strValorCookie.charAt(0) == ' ') {      strValorCookie = strValorCookie.substring(1, strValorCookie.length);    }    if (strValorCookie.indexOf(strNomeIgual) == 0) {      return strValorCookie.substring(strNomeIgual.length, strValorCookie.length);    }  }  return null;}// script.js lines 537-547 — the redirect itself.if (loja_url.search('aliexpress.com') > -1) {                       // any aliexpress.com URL  if (!LerCookie("_alertaOfertasPrecos_red_aliexpress")) {          // only if the marker cookie is absent    GerarCookie("_alertaOfertasPrecos_red_aliexpress", "1", 25);    // set it -> next redirect in 2h05m    var urld = 'http://s.click.aliexpress.com/e/6UJaM7Iqz';         // hardcoded affiliate link, code 6UJaM7Iqz    if (document.location.protocol == "https:") {      // The affiliate link is plain HTTP, which an HTTPS page cannot navigate      // to cleanly, so it is base64-wrapped through the operator's own host:      // https://descontosofertas.com.br/com/buscape/php/api/api.php?red=<base64>      urld = url_estrutura + "com/buscape/php/api/api.php?red=" + btoa(urld);    }    alert(urld);                                                    // alert box showing the raw address    window.location.href = urld;                                    // the tab leaves the page you opened  }}