Malicious PDF — malware analysis report

Static analysis result for SHA-256 f933830e88acaded…

MALICIOUS

PDF

40.5 KB Created: 2020-08-23 16:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 066f3852ab851c096c9b8a08657cbb51 SHA-1: 1c371ab420e95186869c301bdf6edf0a6ac672ca SHA-256: f933830e88acaded8fd79346accca5d674fc931fc9f117d75b160109c09f37c8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link disguised as educational content, specifically 'Bendix online brake school answers'. This link, https://ttraff.cc/pify?keyword=bendix+online+brake+school+answers, is flagged as a malicious redirector. The document also functions as a link farm, directing users to numerous other PDFs, one of which is https://cdn.shopify.com/s/files/1/0433/4452/7525/files/zanikepofodif.pdf. The ML classifier strongly indicates maliciousness, supporting the attack pattern of social engineering via a deceptive link.

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/pify?keyword=bendix+online+brake+school+answers
    • http://files.kcliu.net/uploads/1/3/1/4/131454207/rupijupipoviguvu.pdf
    • http://files.waheed81.org/uploads/1/3/1/6/131637562/bobade-zopodirev.pdf
    • http://files.annapicklesharvey.com/uploads/1/3/1/4/131438274/tagowemadanenez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7525/files/zanikepofodif.pdf
    • https://cdn.shopify.com/s/files/1/0446/6468/4697/files/air_pollution_control_technology_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/79041705601.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/15257985186.pdf
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/the_reader_s_companion_to_world_literature.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/nikufisaxivemelij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/diporivapoxubadudab.pdf
    • https://cdn.shopify.com/s/files/1/0448/0784/8096/files/esp8266_arduino_connect_to_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8513/3992/files/7679476302.pdf
    • https://cdn.shopify.com/s/files/1/0432/7299/4971/files/ccure_9000_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/allison_3000_mh_transmission_manual.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_off00006054.bin
961e5670d6207020d0a0fb46e1ac8152847c03ab0a194a160b154e0bde049352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 5440 bytes
font_01_sfnt_off000072d8.bin
f648cf79fda714a5e23c4b3a3beefefb8033a9d6e2b78cb979c069fd3dc51b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D8 10156 bytes

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