Attach (recommended) or Link to PDF file here:
PDF is [Sample lease contract 26.pdf](https://github.com/mozilla/pdf.js/files/1500985/Sample.lease.contract.26.pdf)

Steps to reproduce the problem:
I am using [https://mozilla.github.io/pdf.js/web/viewer.html](url) to preview pdf by opening the pdf.

now am searching for "**made is**" but its not showing in the pdfjs

and while selecting and copying pdf  text it has no space in b/w words

if (cidToGidMap[cid] === undefined) {
              map[+charCode] = unicodeCharCode;
            }
          });
        }
      }
      if (!(this.toUnicode instanceof IdentityToUnicodeMap)) {
        this.toUnicode.forEach(function (charCode, unicodeCharCode) {
          map[+charCode] = unicodeCharCode;
        });
      }
      this.toFontChar = map;
      this.toUnicode = new ToUnicodeMap(map);
    } else if (/Symbol/i.test(fontName)) {
      this.toFontChar = buildToFontChar(
        SymbolSetEncoding,
        getGlyphsUnicode(),
        this.differences
      );
    } else if (/Dingbats/i.test(fontName)) {
      if (/Wingdings/i.test(name)) {
        warn("Non-embedded Wingdings font, falling back to ZapfDingbats.");
      }
      this.toFontChar = buildToFontChar(
        ZapfDingbatsEncoding,
        getDingbatsGlyphsUnicode(),
        this.differences
      );
    } else if (isStandardFont) {
      const map = buildToFontChar(