Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb591aae975ce35b…

MALICIOUS

PDF

56.2 KB Created: 2020-09-07 11:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2958420e4d88f0e43d141b7a9171666 SHA-1: 29131c6f4ea6de07944d4ae12e1ddefd39b7c1be SHA-256: fb591aae975ce35b9898564a1daa80408d5c72cc23806dd0ceb32a5749716e73
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as a download for 'Acrobat pro dc trial'. One of these links, https://ttraff.me/wix?keyword=acrobat+pro+dc++trial, points to a known malicious redirector. The document body is heavily obfuscated but contains the lure text and the malicious URL. The presence of numerous links and a malicious redirector indicates a phishing or social engineering attack.

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.me/wix?keyword=acrobat+pro+dc++trial
    • https://static.usrfiles.com/ugd/b8c837_ccf468dcf2bc49ac84922b3fc48405da.pdf
    • https://static.usrfiles.com/ugd/b8c837_f244d413efbd4490a8a22d3cdf270720.pdf
    • https://static.usrfiles.com/ugd/2274a7_b1223b02d602406c84c586f5fb43e0c7.pdf
    • https://static.usrfiles.com/ugd/ed8107_ef2005769734441896730218fee5c497.pdf
    • https://static.usrfiles.com/ugd/b4609a_bae8686871fa40fdbe232209f5cc7471.pdf
    • https://static.usrfiles.com/ugd/6924eb_4b2ba484dea34fbca0020f716cef925c.pdf
    • https://static.usrfiles.com/ugd/fb41f9_857c6a890c6e4750ae9c98b3ab269ee8.pdf
    • https://static.usrfiles.com/ugd/a467d2_878c0177dabf4fe586716fd3a9f85cd7.pdf
    • https://static.usrfiles.com/ugd/f65175_a66babb060b444a98f8be4b374bd1264.pdf
    • https://static.usrfiles.com/ugd/008e52_121c83eee91d423eb37eba2f247ace54.pdf
    • https://static.usrfiles.com/ugd/db80c5_e1fe25894c524371b72f4cd4f701ec1f.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/digestive_system_structure.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1956/files/likagawurewotupovepe.pdf
    • https://cdn.shopify.com/s/files/1/0469/0444/3040/files/83952831816.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000749c.bin
60a0da8404760875dc639e20ffb491823417469a2fb3a7687f1dfc2d799d8d80
pdf-font-stream PDF embedded font (sfnt) at offset 0x749C 5236 bytes
font_01_sfnt_off00008706.bin
8ebfffe4aa92809d85559774bd5c2664b056581a4c6d29004fdaa03bdb654dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5016 bytes
font_02_sfnt_off00009821.bin
a29ab672b796ad4297c7b103b3778fc3abc6cdd7e781d7f6f5f87680ac4bce0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9821 10176 bytes
font_03_sfnt_off0000bb39.bin
b88c55219ef84bd2ff48a12f23060c6b86d25efbafe4a8493ce51f9ac91249ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB39 16488 bytes