Your plugin is infected with Win.Trojan.Agent-1395005.
File qppr_frontend_script.min.js is not minimized file of original file qppr_frontend_script.js
There is infected file content
! function(t) {
t(document).ready(function() {
function e(t, e) {
return "undefined" != typeof e[t] ? "1" : "undefined" != typeof e[t.replace(a, "")] ? "2" : "undefined" != typeof e[t.replace(n, "")] ? "3" : !1
}
var r = qpprFrontData.linkData,
a = qpprFrontData.siteURL,
n = qpprFrontData.siteURLq;
t("a[href]").each(function() {
var i = t(this),
f = "undefined" != typeof t(this).attr("href") ? t(this).attr("href") : "",
l = e(f, r);
if (l !== !1) {
var o = "undefined" != typeof t(this).attr("rel") ? t(this).attr("rel") : "",
p = ("undefined" != typeof t(this).attr("target") ? t(this).attr("target") : "", !1),
h = !1,
c = "",
d = f;
if ("1" == l ? (p = r[f][0], h = r[f][1], c = r[f][2]) : "2" == l ? (p = r[f.replace(a, "")][0], h = r[f.replace(a, "")][1], c = r[f.replace(a, "")][2], d = f.replace(a, "")) : "3" == l && (p = r[f.replace(n, "")][0], h = r[f.replace(n, "")][1], c = r[f.replace(n, "")][2], d = f.replace(n, "")), p && "" === this.target && (this.target = "_blank"), h && ("" !== o && "nofollow" !== o ? t(this).attr("rel", o + " nofollow") : t(this).attr("rel", "nofollow")), "" != c) {
t(this).attr("href", c);
var s = i.html();
s = s.replace(d, c), i.html(s)
}
}
})
})
}(jQuery);
https://wordpress.org/plugins/quick-pagepost-redirect-plugin/