Malicious PDF — malware analysis report

Static analysis result for SHA-256 db84aca6395be9aa…

MALICIOUS

PDF

35.4 KB Created: 2020-08-25 17:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e50d5ac1e4478ba4377efb654a5fa56 SHA-1: 612d89bfdd831d75b16888906ff0f8d05afe50c5 SHA-256: db84aca6395be9aa8ad75b38427f3d14a6abcc69b08926d463033ccf1a568953
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.com/pify?keyword=introductory+statistics+10th+edition+weiss+answers'. Additionally, the PDF is flagged as a link farm containing numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, also contains the primary redirector URL. This suggests the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=introductory+statistics+10th+edition+weiss+answers
    • http://files.wobbleseat.com/uploads/1/3/2/8/132816165/fakinujumagu.pdf
    • http://mupob.moviemanmdg.com/uploads/1/3/0/7/130739835/1835821.pdf
    • http://files.sbtindy.org/uploads/1/3/0/8/130814923/1d42e5.pdf
    • http://files.amboy.net/uploads/1/3/0/9/130969356/148072.pdf
    • http://files.johnregan.org/uploads/1/3/0/7/130740211/kuwokol_nedutake_minuzebudaruj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/84228667691.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/20304527971.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1600/9374/files/69665314391.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/python_make_directory_if_not_exist.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/cambium_epmp_1000_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0450/5898/2040/files/attachment_style_theory.pdf
    • https://cdn.shopify.com/s/files/1/0460/1357/9423/files/audacity_for_mac_sierra.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/sophisticated_lady_ellington.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/cold_supply_chain_management.pdf
    • https://cdn.shopify.com/s/files/1/0445/8476/3556/files/37289974775.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/87980017502.pdf
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/wedding_invitation_video_template_after_effects.pdf
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/reciclaje_de_basura_inorganica.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_off00004cb7.bin
62909f8477363415f13e3d87019d7da7267b19d2b0785bea6bc9e3e9b8aa26c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB7 5320 bytes
font_01_sfnt_off00005edb.bin
905b02337a07374bb5f468da4b8c87f5c46eee1dca8e722900c75c596cfcc8b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDB 9840 bytes