Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada9cfb722f9da74…

MALICIOUS

PDF

53.7 KB Created: 2020-08-31 07:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 899f95fa3ca23aee5aaedd1edc1d81fc SHA-1: d3c2568c7ef7b3dd76841c4355868261ef6a1773 SHA-256: ada9cfb722f9da74dda3dc85794001a9d8d03b643f3509a9a1afda6d1f752a61
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=3+chord+ukulele+songs+tabs'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same URL as the redirector, suggesting a lure to a malicious site. The primary attack pattern involves redirecting the user to a potentially harmful external resource.

Heuristics 3

  • 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.
  • 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=3+chord+ukulele+songs+tabs
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/duligigubufozazesenejitis.pdf
    • https://cdn.shopify.com/s/files/1/0439/5712/5278/files/amperimetro_de_gancho.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/ruzudusilezor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/pefigavinibuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/26085219012.pdf
    • https://static.usrfiles.com/ugd/89363e_34b21960e25a43f787edfc8af24842da.pdf
    • https://static.usrfiles.com/ugd/12745a_a1ae95c084664b3ea0139daf4df9fe0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce4376c3d3a342f391a01856abd891d4.pdf
    • https://static.usrfiles.com/ugd/2486b5_8855db2e60a942e68b945aecd8bc3f2d.pdf
    • https://static.usrfiles.com/ugd/67e251_afa402e9bc4e4d0d991bd63bf2793bd3.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/dhcr_fact_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/gojetavavagulokegim.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/astronomy_today_8th_edition_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/91376151866.pdf
    • https://cdn.shopify.com/s/files/1/0430/4194/7801/files/wurujotopufev.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_off00009057.bin
3f33dcf88f75d62df3ed14f8c79058778653838df7605cd96ddd077e9396cda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9057 5476 bytes
font_01_sfnt_off0000a2de.bin
eaef2c679f48b82034179a4f7e1193ddbea336c816c6f2af49cbf56a028320e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DE 12092 bytes

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