Malicious PDF — malware analysis report

Static analysis result for SHA-256 2353c266a7237a6f…

MALICIOUS

PDF

48.3 KB Created: 2020-08-07 01:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a97132fe9089ffe1e0c47f2c0a886b7d SHA-1: d0dcd4b428e1387715293ef77828d115c97c2150 SHA-256: 2353c266a7237a6f849a705dc743892ff1abd3cc69940f538910d5d1809dc8a3
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily corrupted, contains text related to 'Calendario escolar 2020' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm further supports the malicious intent of driving traffic to potentially harmful sites.

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.ru/pify?keyword=calendario+escolar+2020+y+2020+sep+185+dias+pdf
    • http://files.captiv8designsusa.com/uploads/1/3/0/7/130738859/86d772.pdf
    • http://files.claudelafleur.com/uploads/1/3/1/8/131871569/pajuzinafor-tezezuv-vijukimo.pdf
    • http://files.amscanmanufacturing.com/uploads/1/3/1/0/131071258/nifadavewepodog_babomamudag.pdf
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • http://files.rolloconstruction.com/uploads/1/3/2/8/132814071/baxevimo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/46140442513.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/57800195701.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/sorted_edges_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0433/9872/5793/files/dufojegedagidipenuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/zimibego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/fapafax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/star_wars_armada_cards.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/gudevewalelotusebexit.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/32786411797.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/6901192491.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/fejaminapezepigotejixa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f1e.bin
66faa3ae98da74a7339e1c59c00a98f182af28c96305008ad5af3bd12ef835a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 5800 bytes
font_01_sfnt_off000082f3.bin
ab7952e30a868751faa025f2e14b53a51e83c417853e71d0ae878d8a5e8faa15
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F3 1852 bytes
font_02_sfnt_off00008bcc.bin
8511015176cc41bcd0aa0fddff607f6b4a2f84339cd7107e87a7aae39de429f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 11664 bytes