Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81caf49f8df12cf…

MALICIOUS

PDF

43.8 KB Created: 2020-08-24 05:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c80881686354ffc684072f00b81d60 SHA-1: 30ee1dc54fe81c804de6dd46970719a4b3a008f4 SHA-256: c81caf49f8df12cfc7f08fee573d3b4ee9c6a88b3cae9b034f73538a40e23cb5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=bonjour++windows+7+64'. Additionally, it features a PDF link farm, with many links pointing to Shopify domains, suggesting a tactic to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous embedded URLs, including the malicious redirector, indicates a phishing or social engineering attempt to direct the user to harmful content.

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.com/pify?keyword=bonjour++windows+7+64
    • http://jezetu.sunmarketingsales.com/uploads/1/3/1/3/131383483/5372315.pdf
    • http://files.barebeautymilnrow.com/uploads/1/3/1/4/131483083/doborigu-galigozujobo-bozusuraj-xepide.pdf
    • http://bidobuxus.peterandpaulapixie.com/uploads/1/3/1/4/131454215/kuduj-lumataw-wenuxewud-bofixev.pdf
    • http://files.piedmontgreencbd.com/uploads/1/3/1/4/131406715/nalakifaseko.pdf
    • https://cdn.shopify.com/s/files/1/0435/8966/4926/files/sixth_sense_technology_seminar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/xomarab.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8675/files/aprender_italiano_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/oceans_hillsong_united_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1252/9055/files/57188111324.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/angular_material_formbuilder_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/95231702326.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/16047446148.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/54644833847.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_off00006e30.bin
0e8cd40474c6b00579c04ebd5b46357dab5b0cec310daabcdcf94a1260f901e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E30 5116 bytes
font_01_sfnt_off00007fc6.bin
cf900fe395bad3327177337d1eeda274a786cbe6759f0765832d67674bd11794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC6 10308 bytes

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