Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b3fdc74d311218…

MALICIOUS

PDF

77.0 KB Created: 2020-08-20 21:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a125b8b955e3a7203decd5fe5cb0e05 SHA-1: 55b4368ad42af3910f17661a6166f7b9c0fa086a SHA-256: 92b3fdc74d3112189049338f75069f5bc0a96739c23d91ecdd03576194231178
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=brocade+fabric+os+upgrade+guide+8.+2'. The document body also contains this URL, suggesting a lure to download further content. Additionally, heuristics indicate the document is part of a password-protected archive lure and a secret recovery lure, implying an attempt to trick the user into providing sensitive information or credentials.

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/pify?keyword=brocade+fabric+os+upgrade+guide+8.+2
    • http://files.westashdesigns.com/uploads/1/3/1/3/131398479/mawavoban-bugowawax-lepireserov.pdf
    • http://files.incanonmedia.com/uploads/1/3/1/0/131071258/2149966.pdf
    • http://files.creameryartscenter.org/uploads/1/3/2/7/132740628/982905c820b0d93.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/75055853565.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/63218967729.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/jebotedesuveb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/space_marines_codex_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/japajesawel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/anonimo_veneziano_stelvio_cipriani.pdf
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/batangas_state_university_college_entrance_exam_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/design_and_analysis_of_approximation_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/advantages_of_5g_technology.pdf
    • https://cdn.shopify.com/s/files/1/0429/0743/5167/files/41763284927.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_off0000e882.bin
061b07e913017d3f358d976756d2c42711bbf30ccd1fd8e98738d839ff618f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 5840 bytes
font_01_sfnt_off0000fc6a.bin
ef4a94d95dfc1e1d3e7b585fabab96e76cf0b657ed4acb41974b142cca1a0c1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 13208 bytes