Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad09b87d6afe4419…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 09:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61fa0e943c0b9c69a2869edd6e5f9338 SHA-1: b57e8d004ff67e542109c349ccef5284e98cc0f4 SHA-256: ad09b87d6afe4419f8fa7b59e78ff9365bbd39c900065a8344677748465c3151
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=hyrule+warriors+legends+download+codes'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The presence of a 'download button' lure further supports the malicious intent. The document body contains corrupted text but includes the malicious URL and benign-looking PDF links, suggesting a social engineering attempt to redirect users to malicious content.

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.com/wix?keyword=hyrule+warriors+legends+download+codes
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/medical_newsletter_templates_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/liroweb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/62490993091.pdf
    • https://static.usrfiles.com/ugd/e42ee3_c2252407872d40499d32feba6485a1d6.pdf
    • https://static.usrfiles.com/ugd/1decf9_515950978b914e339cd2af124d9e7c1d.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/92848493335.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/62571978727.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/pipawezawexifefexusef.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/409988067.pdf
    • https://cdn.shopify.com/s/files/1/0431/8717/5588/files/cuantos_tipos_de_referencias_bibliograficas_hay.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_off00005cf5.bin
264ee243924d72718a94b93f73704303eaf369ca978e9dd12a217cf4d3513c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF5 5260 bytes
font_01_sfnt_off00006efa.bin
03116a066fd49f8ecacc43a028446f2b0fe42d64b1eee7eac7b9aa17c6b57016		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFA 10308 bytes

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