Malicious PDF — malware analysis report

Static analysis result for SHA-256 9faaefe3853cff10…

MALICIOUS

PDF

33.5 KB Created: 2020-08-08 06:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b46580ad69acf20c1850b881e096236f SHA-1: f307ddbe8952e6fabd3d9e80687adfeee8a00366 SHA-256: 9faaefe3853cff107946f40a55eb060fdd3eaafea159527bc6d18897941d4bb4
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one prominent link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Antenna theory analysis and design solution manual pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The ML classifier strongly indicated maliciousness.

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=antenna+theory+analysis+and+design+solution+manual+pdf
    • http://files.techniac.com/uploads/1/3/1/6/131637797/6149285.pdf
    • http://karoju.chihuahuafrentealcambioclimatico.com/uploads/1/3/1/6/131607163/40e2546156500.pdf
    • http://fetuwal.instriderunner.com/uploads/1/3/0/7/130776760/gumul-diganozejevejap-sapupitew-devomopamojugit.pdf
    • http://files.sakuraphotographyco.com/uploads/1/3/2/6/132681062/wesofubiboda_wosipuka_tamisilifuda_togakavobe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/82016401964.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/22527146301.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/subatepukaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3593/4370/files/zozimupezopenajiko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/futimulas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/kafatigadixojesulazoloxuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/articles_practice_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/identification_of_plant_pathogenic_fungi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/underline_in_discord.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_off000044f8.bin
7b95fe9095be7549a2afabecff19f284885b0dcb5c63915407f6d2dd805e2b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F8 5544 bytes
font_01_sfnt_off000057b4.bin
9bdf3d5eac02095d1c768a540069cebabbc01b6a11723a578de82c077c9b8f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B4 9768 bytes

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