Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e59e55a2c55626d…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 18:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53c4aed9047c6e4e3e35d73b74578d59 SHA-1: 24e7aa1616580ba640b500ec3c85626fa71b4d9e SHA-256: 4e59e55a2c55626d9da89d737726fb57f90ccfad62a7a9bad4e9d4f3fe23f0ff
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, identified as a link farm, with one prominent link pointing to a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'blended learning journal pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.ru/pify?keyword=blended+learning+journal+pdf
    • http://files.refugegarnethillart.com/uploads/1/3/1/4/131438240/salawo-vupiwekel-vifega.pdf
    • http://files.thedigestivehealthclinic.com/uploads/1/3/2/7/132741110/fbee3ef7fa1.pdf
    • http://pudulezuj.graphiclibrary.org/uploads/1/3/1/4/131437318/mevujodufilew_sefevuno_bosubunulun.pdf
    • http://kejuk.tiftcountysoccer.com/uploads/1/3/1/3/131380591/vowawavabipowe.pdf
    • http://sitas.masjidrasoolallah.org/uploads/1/3/1/0/131070374/muvodol-fenosasazosares-kuzululapawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/wenujazisoforuvaja.pdf
    • https://cdn.shopify.com/s/files/1/0440/1856/5270/files/vista_128fbp_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/94332760246.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/zodifokava.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/96585297433.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/zedawanirozorala.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/tosuvofol.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_off00007269.bin
ed9de973079d0906748c5d85201e5e08ae528ce666738495ab716e0d6e553320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7269 5156 bytes
font_01_sfnt_off0000840d.bin
edbc41808f2c7d353d180c16fd9abb5fcad327e082b3951ea61ba076924114ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 10268 bytes

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