Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8c13ce34f11aef…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 23:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ce2bd874a941fb1f84fdc76ac2ddd2e SHA-1: 21376ccad7c7a9b7f23c5a977b4b0fc0706828b3 SHA-256: 9b8c13ce34f11aef9bde5ae6c1c30903392abecd43ffdfb83a77e503cc8c825e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a common technique for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=wedding+escort+cards+template+free, which is likely the initial lure. The presence of many Shopify links suggests an attempt to blend in with legitimate content, while the malicious redirector indicates a clear intent to lead the user to a harmful destination.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=wedding+escort+cards+template+free
    • http://files.elliottacrestherapyriding.org/uploads/1/3/1/4/131438538/1415e0230b93fd.pdf
    • http://didaw.noahsplacepettingzoo.com/uploads/1/3/0/7/130775320/sipuwunajope.pdf
    • http://files.ficinoensemble.com/uploads/1/3/0/8/130874122/masemoxamuviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/petals_on_the_wind.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/zilonoxus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/36388368879.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/4790479505.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2468/files/pupozodiwujojozipuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/brother_quotes_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/wobowonik.pdf
    • https://cdn.shopify.com/s/files/1/0445/8368/2212/files/kudumiwir.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/55708935806.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/cset_physical_education_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/duruk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/what_color_is_the_discord_background.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/91942409158.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/49442365721.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d09.bin
0306ce5351c87f4a2bd0ec7d2db224c1e96b8a6785dbf95b8a712d79d334b83a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D09 5488 bytes
font_01_sfnt_off00006fa6.bin
5a78268db07f4088df2dc56f4b4533c545c0f1ddc59a687bc6fa64f5ed28175c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 10680 bytes