Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef2037d42577d09…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 01:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ecb42238e73384588cf83d2c0faf602 SHA-1: 3e5233b5db22b59be4bd6bf7fc1c3d473ef47a24 SHA-256: aef2037d42577d098e5551fc229f96326b48bf14e7aa361f391a65243d04b60d
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 'https://ttraff.ru/wix?keyword=angel+number+231'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF URL, suggesting a lure to a malicious site. The primary attack pattern involves directing users to malicious infrastructure through embedded 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=angel+number+231
    • https://static.usrfiles.com/ugd/b8c837_2c2ee0dedd6a448a91324ba382142939.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4331bf6850348ae97cdea7eee0664fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_5def78df6d9a4c24803373e69d6f63c3.pdf
    • https://static.usrfiles.com/ugd/b85eb0_92bb3af1510942d58808b1df83a1c578.pdf
    • https://static.usrfiles.com/ugd/b8c837_232f1ba59f154013bfdfcf99f5e48480.pdf
    • https://static.usrfiles.com/ugd/64d889_f12e5cc29734475685cc0ad945ffd64f.pdf
    • https://static.usrfiles.com/ugd/b9801a_ee6ca17e750047258bcf611af058d977.pdf
    • https://static.usrfiles.com/ugd/d01287_aacb25c6ecff4cdc962175f0b963f1ed.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_52998d4549ce4d0faf0740593a0e660b.pdf
    • https://static.usrfiles.com/ugd/30e015_eb0721b375ba46f68bd6b94b9bc1922e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fd98ab8379b47ddb5271056b0ae102f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef1b0984d9904d32a900d231d6285c50.pdf
    • https://static.usrfiles.com/ugd/850f07_ed87fd7b373445a4b234a7a5481f282f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c321b8ac21400d8c27f0f82d7e0ab3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c16040f2b1494269afa06d1499528da4.pdf
    • https://static.usrfiles.com/ugd/d5415a_dfed8a32545441d4833afa6f44d8ac96.pdf
    • https://static.usrfiles.com/ugd/b8c837_976983f0ae774b2dadcb0fd2b6769143.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_off00006996.bin
2564c1356af9ca27759d0e0fe62a0516551d9b41fad33e47efe08af9b89a4fe3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6996 5096 bytes
font_01_sfnt_off00007ada.bin
0064c9a32df9b14ef40fabe091ba7dd3c85b4c15510e0e12c76a7808a204afab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADA 10924 bytes