Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed54285f6b0c1a0…

MALICIOUS

PDF

54.6 KB Created: 2020-08-11 10:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe73ca4d176d74efc352c8f16ad1c57 SHA-1: 67ba8494810b875a86c44657baef875968431f81 SHA-256: 1ed54285f6b0c1a00d2b06aae00def8233711acd19301e7adbfc5eef53292b6a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=minnesota%20vikings%202019%20schedule%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier strongly flagged this PDF as malicious.

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.cc/wb?keyword=minnesota%20vikings%202019%20schedule%20pdf
    • http://tidusu.bowensminifarm.com/uploads/1/3/1/3/131383309/xozubelabowiteb-mavilo-zuxekamila.pdf
    • http://saxuwu.initiatives.com.hk/uploads/1/3/2/6/132681670/6355313.pdf
    • http://files.saidbysydney.com/uploads/1/3/1/0/131070330/020a95e9bed524.pdf
    • http://files.katewestcott.com/uploads/1/3/0/9/130970003/fubepililovop_zutunup_jimon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5169/6796/files/sacrificial_anode_cathodic_protection.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/lyme_disease_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/39004909373.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/20887713023.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/33372632962.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/xipeligivunawuzow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/79959345819.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/rotuva.pdf
    • https://cdn.shopify.com/s/files/1/0441/1867/1512/files/gmod_gore_mod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/angularjs_session_management.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/pacific_fitness_home_gym.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/capacitores_dielectricos.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_off00008997.bin
6394fd14dbbb9ba272f7b674d64945a9f5a8ea18bea03474f1047a16fac65394
pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 5932 bytes
font_01_sfnt_off00009de0.bin
215031159e31d6c051aa715a3451a6168453b2c23612e55ccc97e95b91fa98e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE0 15296 bytes