Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebb86babb7870ce…

MALICIOUS

PDF

49.6 KB Created: 2020-12-06 10:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd5b8b62bbdde7c797cee5b38475369d SHA-1: 6b7d9bae2722e8e04eb43e20b196b497234e1a36 SHA-256: 0ebb86babb7870ce0b9fc115e3a4d536987f600b457c3ac036e83aaf41ce8613
212 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The heuristic firings indicate this is a malicious redirector and part of a link farm, suggesting the document's primary purpose is to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9229

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=deadpool+mask+sewing+template
    • https://cdn-cms.f-static.net/uploads/4425010/normal_5f9a01d3e18e5.pdf
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f94973672e65.pdf
    • https://cdn-cms.f-static.net/uploads/4449793/normal_5fbc5c6d9eeb4.pdf
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f937e0e71cfd.pdf
    • https://cdn-cms.f-static.net/uploads/4495860/normal_5faef08424b62.pdf
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f9c6265decd4.pdf
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/fodefifixobine.pdf
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5fc319e4eca48.pdf
    • https://uploads.strikinglycdn.com/files/6747eeb9-3d13-4b97-9d58-cb973cfcd734/services_marketing_zeithaml_6th_edition.pdf
    • https://s3.amazonaws.com/gixirojozogufux/1981802492.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/density_simulation_lab_answer_key.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/cdse_syllabus_2019.pdf
    • https://uploads.strikinglycdn.com/files/826cd918-6d6e-44e8-a1f6-253da4573374/3345864285.pdf
    • https://uploads.strikinglycdn.com/files/ca009178-d7ba-445f-96c6-4186fcfe4ce6/south_washington_county_schools_human_resources.pdf
    • https://s3.amazonaws.com/tizowodifi/kabatomujaxaxuxe.pdf
    • https://s3.amazonaws.com/fopalew/biology_form_2_revision_notes.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000babc.bin
18d1a5a48bb5a12d097b92519c949a7079420409096710c6b2fc6645f828618a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBABC 4552 bytes

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