Hi,
Please insert given below custom php code at functions.php of child theme and change the icons as you want.
<?php
function sf_product_share() {
global $post;
$src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), false, '' );
?>
<div class="product-share clearfix">
<span><?php _e("Share", "swiftframework"); ?></span>
<ul class="social-icons">
<li class="facebook"><a href="http://www.facebook.com/sharer.php?u=<?php the_permalink(); ?>" class="product_share_facebook" onclick="javascript:window.open(this.href,
'', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=220,width=600');return false;"><i class="fa-facebook"></i><i class="fa-facebook"></i></a></li>
<li class="twitter"><a href="https://twitter.com/share?url=<?php the_permalink(); ?>&text=<?php echo urlencode(get_the_title()); ?>" onclick="javascript:window.open(this.href,
'', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=260,width=600');return false;" class="product_share_twitter"><i class="fa-twitter"></i><i class="fa-twitter"></i></a></li>
<li class="googleplus"><a href="https://plus.google.com/share?url=<?php the_permalink(); ?>" onclick="javascript:window.open(this.href,
'', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600');return false;"><i class="fa-google-plus"></i><i class="fa-google-plus"></i></a></li>
<li class="pinterest"><a href="//pinterest.com/pin/create/button/?url=<?php the_permalink(); ?>&media=<?php echo $src[0]; ?>&description=<?php the_title(); ?>" onclick="javascript:window.open(this.href,
'', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=350,width=750');return false;" class="product_share_pinterest"><i class="fa-pinterest"></i><i class="fa-pinterest"></i></a></li>
<li class="mail"><a href="mailto:?subject=<?php the_title(); ?>&body=<?php echo strip_tags(apply_filters( 'woocommerce_short_description', $post->post_excerpt )); ?> <?php the_permalink(); ?>" class="product_share_email"><i class="ss-mail"></i><i class="ss-mail"></i></a></li>
</ul>
</div>
<?php }
}
?>
Thanks
Mohammad
.