Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba248e5fa6a4cd68…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 03:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e814919aa4ead5fbe8eeddc91791d573 SHA-1: c3a31373681333ebbf3a003079edcfb96addfba0 SHA-256: ba248e5fa6a4cd68bfa14438a506ad05107f5ab979e398399915fe15044392a0
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs. The presence of a 'Password-protected archive lure' heuristic suggests the document's primary purpose is to trick the user into downloading and decrypting a malicious payload, likely facilitated by the embedded malicious link. No scripts were extracted from this sample.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/wix?keyword=ucsp.edu.pe+portal+academico
    • https://static.usrfiles.com/ugd/b8c837_fd7ebbcfaa44454eb0f4369e08efcf9a.pdf
    • https://static.usrfiles.com/ugd/0d002d_d3fa48e712d3448bb596c8efbe40cd0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_34613afffee84039b3d31d112bd4837f.pdf
    • https://static.usrfiles.com/ugd/565485_4e0158a20242451b82393ac3ef0473a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e35fb9174f764b579e129f622a8f2444.pdf
    • https://static.usrfiles.com/ugd/b8c837_c68620902859432095bf6ea14c335038.pdf
    • https://static.usrfiles.com/ugd/20d83a_255d20faff994dbaa59bf2445ce24809.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/47279562214.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/suwarizexazivom.pdf
    • https://static.usrfiles.com/ugd/4d6844_7b3f8064c03749a9b54743bc3f6cc5e6.pdf
    • https://static.usrfiles.com/ugd/9e41f0_47c52c157c1a4057bfc247355b7cb2c5.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_off00005796.bin
ddedda8cf23db57b5b4c58b6caa32585ed1ee75603445e65a61c4a196f33db68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5796 5240 bytes
font_01_sfnt_off00006951.bin
e7dc8348fcb7989842bb7adecab1bb46ab158961cd4109887cc4cb6e4fe9535d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6951 10540 bytes

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