Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e9fdcad2926560…

MALICIOUS

PDF

46.1 KB Created: 2020-08-23 09:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9787bb81038344e85ead0ce15c716f58 SHA-1: db09699701bb37475fd86df862a99c95d1f3834a SHA-256: a7e9fdcad2926560afc831c7fda9e77dd424f6806f16085e67c1a09f9adf6c59
150 Risk Score

Malware Insights

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

The PDF contains a link disguised as sheet music that redirects to malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the ML_NYX_PDF_MALICIOUS score indicates a high probability of maliciousness. The document body, though heavily obfuscated, contains the lure text and the malicious URL.

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=bts+epiphany+easy+piano+sheet+music
    • http://files.tropicgardengems.com/uploads/1/3/1/0/131070109/a9496c771acb3.pdf
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdf
    • http://dupefalal.mondokdentalimplantsmexico.com/uploads/1/3/1/0/131070581/100438.pdf
    • http://files.roselapiere.com/uploads/1/3/0/7/130739490/piriresewamavel_tavexu.pdf
    • http://files.the-learning-agency-lab.com/uploads/1/3/1/1/131163943/rofin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/dulajaluj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/wuxezafotevisupirexala.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/zazaranexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/berazajelikuwobalawira.pdf
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/xazamikabewinunaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/lagobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/mekizod.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/speed_torque_characteristics_of_dc_shunt_motor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/transaction_log_shipping_status_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/jediwugepigidozi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/85756847581.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_off000070c0.bin
b91bee2fe8ccdfabbba4a52c3af535e2a1f64d8d2479089e3195950067f6df5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 5196 bytes
font_01_sfnt_off00008249.bin
a8bd4809230cecda6554a2e38b2002e38907bbe458201617c3ce4cdc05d6c772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8249 13440 bytes

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