Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bca1a54d5e027b3…

MALICIOUS

PDF

32.0 KB Created: 2020-10-11 16:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ca7b5bc479e095e4d70681070ea29c SHA-1: 59c51e0a0a1760ecb5dbc26adc47ed72ca0ffe84 SHA-256: 8bca1a54d5e027b315708cc43da8277c6187b6f901bb8fccf8b924d346e41a8e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to a redirector URL associated with malicious activity. The document body, though partially corrupted, contains text related to 'Moonlight sonata piano sheet music with letters', suggesting a lure to attract users searching for such content. The presence of a large number of external PDF links, many with numeric slugs, indicates a potential SEO poisoning or link farm tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?keyword=moonlight+sonata+piano+sheet+music+with+letters
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/47675140-3f34-4b23-bf5b-b38d03aade51/17787047876.pdf
    • https://uploads.strikinglycdn.com/files/e119e486-13f2-4c77-beb4-6e8899a55534/mufulaka.pdf
    • https://uploads.strikinglycdn.com/files/18eb6566-fef8-4201-b44e-84fc1f127615/47723953513.pdf
    • https://uploads.strikinglycdn.com/files/2a8425c1-7e47-4951-a07c-48fcce4ba18f/tevogisud.pdf
    • https://uploads.strikinglycdn.com/files/19028887-a626-4838-8cf5-2f6c59a0654f/livamoxulupukuv.pdf
    • https://uploads.strikinglycdn.com/files/ac6eab18-ac10-4f24-b4f5-8a0c8a0c3353/23904916546.pdf
    • https://uploads.strikinglycdn.com/files/f287d0eb-0553-4c40-b8f2-27f63fb2f15a/mukexafokereve.pdf
    • https://uploads.strikinglycdn.com/files/a249f3b1-7c63-45c2-a4c1-850368b9f494/96024997670.pdf
    • https://uploads.strikinglycdn.com/files/29058777-1f42-4e72-a22d-564969da4d54/boxiwabutoxuvev.pdf
    • https://uploads.strikinglycdn.com/files/bb262a09-bdcc-4809-a56b-56fabeb0e633/24640270477.pdf
    • https://cdn.shopify.com/s/files/1/0477/0005/0079/files/bmx_streets_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0480/1527/8239/files/tabla_periodica_grupos_o_familias.pdf
    • https://cdn.shopify.com/s/files/1/0435/3880/8991/files/xovipinadelabexegixama.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/david_mcgraw_drummer_seattle.pdf
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/cliffspring_river_sample.pdf
    • https://cdn.shopify.com/s/files/1/0481/1433/5897/files/mascarilla_para_la_cara_grasosa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/great_white_brotherhood.pdf
    • https://cdn.shopify.com/s/files/1/0437/4783/6058/files/medical_school_personal_statement_examples_stanford.pdf
    • https://cdn.shopify.com/s/files/1/0478/9557/6742/files/pukiwagilojetebovi.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bfa.bin
d7df492d935ae29fc0e963a2d39f47ae40748ad3dacb74a6dd099e1f422f919d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 5444 bytes