Malicious PDF — malware analysis report

Static analysis result for SHA-256 24aa988470374077…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 17:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b869d631272370f3babadac441330a8e SHA-1: da8a4cb6133dd76d3d0b4447dfe1ba5e8f8b5f52 SHA-256: 24aa988470374077559a31ffe302dcdd21eef9751b39b9aab57128779d9c5dd8
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and several other PDF links, likely intended to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

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=cannizzaro+reaction+pdf
    • http://files.imaginationmax.com/uploads/1/3/1/4/131437341/kemovon_gifonop.pdf
    • http://files.steelbridgecoffee.com/uploads/1/3/0/9/130969645/duneporeluvexos_lutesonipo.pdf
    • http://files.finestmakaticondo.com/uploads/1/3/1/3/131383323/66879e7.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/wanudusuxezonukejuduf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/nalin.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/html_to_react_native.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/achieving_our_country.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/vesozagorupunixajifula.pdf
    • https://cdn.shopify.com/s/files/1/0435/4700/0983/files/josovezogefodatupewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/66251122437.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/rizixereduvurafab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/mifaxizefomewaja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/farelozamupedofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/waboxufewapobak.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/51112524903.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2550/files/lonafexaxelafipen.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_off00006700.bin
acbf63320c56091d3f3f9994d8ea5ae91672637e80f36b9f88807de4dd9ea0ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 4896 bytes
font_01_sfnt_off000077bc.bin
abb13ad623be9a0a59b939e5d34894f985afca7ed5de7e7ccf63a6d7142e6861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 10456 bytes

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