Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4c6b116946321e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 14:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abfb9df59ef2455c9e5db213b0750332 SHA-1: 560c8eebcc8f7978ce582d1ca6cefbd98d3fd860 SHA-256: 2e4c6b116946321ea920603d61cf584ea970f83bbf30261700d1045c77143c69
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. One such link, disguised as a medical dictionary, redirects to `https://ttraff.cc/wix?keyword=dorland%2527s+medical+dictionary+free`. This behavior, combined with the ML classifier's high confidence score, indicates a malicious redirection attempt, likely to a phishing or malware download site.

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.cc/wix?keyword=dorland%2527s+medical+dictionary+free
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/life_is_a_game_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0428/4658/4999/files/555978173.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/movikulewerudazuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7700/8548/files/naval_architecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6599/8501/files/factory_idle_save_editor.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f540c36f1c48febaffc0d2ab13633a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4dda66298124c45b7c90b0a0761bc49.pdf
    • https://static.usrfiles.com/ugd/b8c837_4efb80aefb604543b9579b418baff67c.pdf
    • https://static.usrfiles.com/ugd/6f7357_6c459896a230417686c8b54869863878.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/61611760154.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/nofuwofedegeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/nejapoburizizozepixogizam.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/describing_charts_vocabulary.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd2f6ee4e29a45189d21658e1e5c2d3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7d85ffc7e1344a5ac97b1d8aeef9855.pdf
    • https://static.usrfiles.com/ugd/f0f215_bde4943334574f6cbb9e5f2709f2e675.pdf
    • https://static.usrfiles.com/ugd/32777b_3f3df6bd8d184a05be1f0c1870e79d8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1ac3b661c8f48688e38482448d49d01.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_off0000631f.bin
4cc07e22fe4cfd515e6d137c3cda2ce3c4daecbac3dfa937a3dde8ef68aae99c
pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 5304 bytes
font_01_sfnt_off00007521.bin
ae90d20ef78d589f9229fa66687e7e56cf8d8c26f291a50d644045bdce80aaf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 10816 bytes