Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e27c9d8ca90b43…

MALICIOUS

PDF

30.9 KB Created: 2020-11-05 07:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45b870b441ebfba393fb17a81dc535b8 SHA-1: e722a73c2524cb58a1fa914de5a7fb3eafb6c33e SHA-256: 45e27c9d8ca90b43cd4894092daf00d06e7fff56b4c8727871eba89ecc1f6186
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/123?keyword=marvel+strike+force+apk+hack
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5f98a0b324bf7.pdf
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/vigukofuve.pdf
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5f9acb43ed924.pdf
    • https://giwirakixa.weebly.com/uploads/1/3/3/9/133999144/a5cf32f4.pdf
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f9b3834c07aa.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f87dbadf3881.pdf
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/fimexanabejojo_bowibivejaxipeb_kawuneneverinas.pdf
    • https://cdn-cms.f-static.net/uploads/4381997/normal_5f9838dd7d2b9.pdf
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f98555dccc7d.pdf
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/jesobadulululumi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/095e1021-51d0-463d-a226-c2b733e5bb77/17280879620.pdf
    • https://uploads.strikinglycdn.com/files/b4c9a4c9-ab27-4d5c-8642-4f21c304d740/90248830535.pdf
    • https://uploads.strikinglycdn.com/files/3dabbe2f-6b3b-43cc-aecb-05d97b9b75d0/tipo_de_enlace_de_h2o.pdf
    • https://uploads.strikinglycdn.com/files/f85f8969-a426-4784-8d9b-ac5df4dceaa0/48953636454.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055da.bin
7294150eefd10e2f8405738933330df0a950da545742acbb8f5056153f1707bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DA 5232 bytes

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