Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca3c57df68d47e4…

MALICIOUS

PDF

44.6 KB Created: 2020-08-22 21:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59c2c84ca245af34389c6928d7df5b4 SHA-1: df1556d37d8a5b8bc9822eed4d7dea8394a817a4 SHA-256: 3ca3c57df68d47e462ad3dc1028858489e30020e4c123a177224c1fe81055808
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious URL, disguised as an 'offer acceptance email template'. The document also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains but ultimately leading to potentially malicious content. The presence of a 'download button' heuristic further supports the lure to click on these links.

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=offer+acceptance+email+template
    • http://rekuver.stevesilkroad.com/uploads/1/3/0/7/130739629/ec1088.pdf
    • http://files.looneymoons.com/uploads/1/3/0/9/130969368/d703f058d.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/31729119304.pdf
    • https://cdn.shopify.com/s/files/1/0439/1033/2571/files/20472118519.pdf
    • https://cdn.shopify.com/s/files/1/0437/1939/3448/files/timapezife.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/html_transparent_color.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/project_initiation_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9878/4422/files/dexawubemuxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/77384846481.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/antropoloji_kuramlar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/host_a_website_on_github.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7282/files/resumen_aparato_locomotor.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_off000070cc.bin
f60baf613d3dd57ccbdced34c99a9215dd47b6d7d22965ff7e5c4f44364bea95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CC 5008 bytes
font_01_sfnt_off000081c6.bin
f4061f8345b7726b5817d9bb0ef68c63cebd134a1e02f0573f9d8239c9352fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C6 10636 bytes

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