Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b8ee2317cb31fe…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 03:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66982724fbe61f60d62338b5da0f2c25 SHA-1: 48d2d142bcfc08f45e284beb3f90e22bcf05da02 SHA-256: 90b8ee2317cb31fe1ba31f20c80346fa0ca7f7c072606b1854826f5341ebfda1
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The presence of a 'download button' lure and a large number of embedded links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The primary malicious URL identified is https://ttraff.ru/wix?keyword=ati+mobility+radeon+hd+6370+driver+d, which is likely used to deliver a secondary payload.

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/wix?keyword=ati+mobility+radeon+hd+6370+driver+d
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/86359129873.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/53788283542.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/45357363600.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/sql_server_express_2016_sp2_full.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/81662395265.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/70034420298.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/jukekodikorubuwoti.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/gomarasovesutalemas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7148/files/82138703257.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/lipoguli.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/mijudowukosu.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ee590db22b0406ab72ad62683a0418b.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_dc23a88de52847c1a2ea88e45427ce08.pdf
    • https://static.usrfiles.com/ugd/7baf93_82a56b7bbe1748e6aacb837499748d97.pdf
    • https://static.usrfiles.com/ugd/cf79db_f70fbe394f5d4c12912c09d4cd2f7392.pdf
    • https://static.usrfiles.com/ugd/b8c837_54d4cf8d3a224de9b0cee851fed2f3e0.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006848.bin
a122c7d74dde75908d849c56854b12b62f3715cfe1a7eba45a00013d3ed5282d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6848 5716 bytes
font_01_sfnt_off00007b9b.bin
0fbad3fee0c4d3b4d8dcb75a2500bd82ea28130544b6184ae87eb6fa092cfa3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 12060 bytes