Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e20f156d4051d0…

MALICIOUS

PDF

35.6 KB Created: 2020-11-08 13:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 658387303b86f9723f7141e57c06b3dd SHA-1: 69a79044b9ce66949ac07fc773f2efdd8d58e444 SHA-256: 45e20f156d4051d0c546bca3a63da3fd9190e5c18865a1c8d73e4b6d139e0e04
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many of which are part of a link farm, suggesting a deceptive purpose. The presence of a URL pointing to 'traffnew.ru' with a 'media player download' keyword indicates a potential lure for users to download unwanted or malicious software. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?keyword=media+player+download+for+apple
    • https://cdn-cms.f-static.net/uploads/4408471/normal_5f938eec59005.pdf
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f8f71eb340d7.pdf
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f8e0aca9ba13.pdf
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fa5c44cba403.pdf
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5fa2e6ac1148f.pdf
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f98a571b3e07.pdf
    • https://cdn-cms.f-static.net/uploads/4449599/normal_5fa7804b43753.pdf
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5f909ce4bafca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bofake/low_back_exercises_at_home.pdf
    • https://s3.amazonaws.com/fasanag/49307728328.pdf
    • https://s3.amazonaws.com/sugaguxagu/foritejixuwuzisamekatig.pdf
    • https://uploads.strikinglycdn.com/files/de8cd7ae-b27c-470a-b8ed-15eb624d9ae1/55717859968.pdf
    • https://s3.amazonaws.com/tefelaj/seitokai_no_ichizon_wiki.pdf
    • https://gonugatak.files.wordpress.com/2020/11/fuwujisovixunokumamabi.pdf
    • https://s3.amazonaws.com/levumoduf/77834848485.pdf
    • https://kigokivaj.files.wordpress.com/2020/11/input_checksum_is_invalid.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000717f.bin
5cba3cf903768cc5d70dce5e81389fe212e35cdfc726a0ecc577a7afac06002b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717F 5056 bytes

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