Malicious PDF — malware analysis report

Static analysis result for SHA-256 9523e3d0121879f0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 10:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eb36c5c5dc09e1a2e8d069a506b03d8 SHA-1: 414685ff84e68672303536026a0a2330195a8ec6 SHA-256: 9523e3d0121879f0dba935ffbca3abc7313188f8d60169c8d36b0f13f5680bcf
128 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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to 'static.usrfiles.com'. The document body, though partially corrupted, contains text related to 'hack game archero' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a 'download button' heuristic further supports the deceptive nature of the document.

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=hack+game+archero+cho+android
    • https://static.usrfiles.com/ugd/b8c837_a786aaf3fd034701b61548af9270c6a4.pdf
    • https://static.usrfiles.com/ugd/0511f5_f0932090329b441b8d2df8e38b4a608f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a36c8583f62e4a5581e4a3c14d6868a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3a30c779d64caa82f7c8d520bb5d73.pdf
    • https://static.usrfiles.com/ugd/b8c837_da81ffc69bf14d968c624e05886684c2.pdf
    • https://static.usrfiles.com/ugd/f96b02_828537ce447b4ec993fe0015efb62f79.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd78d30831c44b54afee094af1d5ca48.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a4f14071a4c426f88c4eb5238b1e70f.pdf
    • https://static.usrfiles.com/ugd/cb4a18_3ee322d5abcb49eea7eb962d7d715307.pdf
    • https://static.usrfiles.com/ugd/599026_12be9c7ec4f84a21a67bb027caf08e39.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_e805fd4e259b46b395c90bef85c9e1bb.pdf
    • https://static.usrfiles.com/ugd/73cb9e_ef830b18bd594297b4f6d9859658cd52.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e7a86fa69c4d9eb9c52e1113801517.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_off000062e9.bin
f2b34848cb3e81246e551a94ba5d74bc26e8bd8b25d71dc82633ba5caacee07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 5168 bytes
font_01_sfnt_off0000744e.bin
b2db5888cb4e3dc6cc98fed26691dbff2bb0b13b356d074d8285fc15cb9787c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 10904 bytes

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