Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2642a76675f254a…

MALICIOUS

PDF

43.3 KB Created: 2020-09-17 04:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a324370967f0fee93843c56036c5fe SHA-1: 2a04bea03c068cb8925eb0f51175415f5f99c8b4 SHA-256: c2642a76675f254add524a5840bb50ccff08f7a1ad955daa60aa5314906f1e57
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains a URL that is also listed as a critical finding. The presence of numerous embedded links, including one pointing to a known malicious redirector, strongly suggests an attempt to lure users to malicious sites. The ML classifier also provided a high confidence score for 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.club/wix?keyword=kojiki+pdf+espa%25C3%25B1ol
    • https://725500c5-5f26-431d-b029-092a1472238c.filesusr.com/ugd/4733ca_186c649c0fae4f4fb4d4a8170f76c963.pdf?index=true
    • https://c6cfaefd-826c-4a2d-8533-ef5b5fb6c7c6.filesusr.com/ugd/f515ca_2b9575f9a00644e7aea40a6fe9dc134a.pdf?index=true
    • https://f2f2c6a9-3929-4519-a5ba-978ae50cdd55.filesusr.com/ugd/c638b7_8ac8b7e427b14098bef31bf8cb078d99.pdf?index=true
    • https://f66cb848-fa59-4272-896b-7a1920f8dc6c.filesusr.com/ugd/28146e_de47f3c3d3a54f3787703d918e85dce1.pdf?index=true
    • https://3ca85fee-a89f-45fc-b6bd-5c83ab49b579.filesusr.com/ugd/89441e_3996f0c94b664d7eba10befc72d9b70f.pdf?index=true
    • https://ce49b129-7563-4411-a636-6ce1040fb56c.filesusr.com/ugd/ae15ca_318c444e5e674ce58b312aa9c89a0042.pdf?index=true
    • https://c2ee2e85-95ee-4c4d-8658-becd7b972ec4.filesusr.com/ugd/d8966e_6a80ab5fc5e244c6b6ad968c794bd03b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/3023/9642/files/farmacos_antagonistas_del_calcio.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/21928842800.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/68406722958.pdf
    • https://cdn.shopify.com/s/files/1/0484/8222/2230/files/student_activities_manual_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/4336/4759/files/integrated_marketing_communications_plan_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/jspdf_autotable_max_width.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/lanagoxugijatiwolup.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/voices_lyrics_disturbed.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_off000056a5.bin
ac8c8da2fafc9e0c81899a9f61b3226907df4cc6f598cc554ce1c0b6d7e87620
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5 5588 bytes
font_01_sfnt_off00006a08.bin
e749f1688c9887ec211d6d87ca4cde8f72b83a7c53db9dcb39e5b1c075a129a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 5260 bytes
font_02_sfnt_off00007bce.bin
2107576c35c638971d1790a8bfdcf86b967bc2aaf5e66e314a397aae2ca6f6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCE 10308 bytes