Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf4fd4a869b7cd3…

MALICIOUS

PDF

33.9 KB Created: 2020-08-31 18:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94e1b6bc8c230a8652ac6b0bab19390d SHA-1: f695cc3b5ff0bf416d9af6d18a0811d0bc6b51eb SHA-256: 2bf4fd4a869b7cd39accceee6e38f637f3a5a755231ab838c7eb0b50ebeb4f4d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, disguised as a referral form. The document body and embedded URLs suggest a social engineering lure to trick the user into visiting the malicious site. The primary malicious IOC is the redirector URL, which is likely used to host or chain to further malicious content.

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.ru/wix?keyword=st+george+antenatal+clinic+referral+form
    • https://static.usrfiles.com/ugd/f80014_e15a7b8fc04a45b8b6c74e859da518f1.pdf
    • https://static.usrfiles.com/ugd/d5cf39_e3994363b269412181d3e0e7d591984e.pdf
    • https://static.usrfiles.com/ugd/269bb8_133b766c2d464f0f8446109bfa9e2669.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/57018818448.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/negemoli.pdf
    • https://cdn.shopify.com/s/files/1/0440/5411/8550/files/wutorozodipekurupox.pdf
    • https://static.usrfiles.com/ugd/e745be_cee4d2fcee65444587d1a714c0f262bc.pdf
    • https://static.usrfiles.com/ugd/7f46b5_ac19792bb46d4e089cf87042713979e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6107227752f744bc9b6093a3d5bc7f42.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_off00004773.bin
8be6f74017cc484ec737debdc1879400180102697a4358da22d0540d6c2b695e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4773 5124 bytes
font_01_sfnt_off000058d3.bin
d71e8a56103142e49e2dc7c1c57d054da7f10bf4cc897418537a494cab10ab7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D3 10012 bytes

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