Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd8e6aa4afd7bfa…

MALICIOUS

PDF

107.8 KB Created: 2020-08-19 00:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2e45312fbeb1607f42020f22ffc3bde SHA-1: 3b70bb90afaf8cf76a9b792ad92f723a460a69db SHA-256: fdd8e6aa4afd7bfa6f0eb220f674ac60c67561b708fed3cb9decd7c4563e0338
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious sites. The document body, though heavily obfuscated, contains the same URL and a title related to a 'Biological product deviation report definition', suggesting a phishing or scam lure. The presence of numerous external PDF links also indicates a link farm strategy, likely to improve search engine ranking for malicious 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.cc/pify?keyword=biological+product+deviation+report+definition
    • http://files.golovkova.org/uploads/1/3/1/3/131381919/8004192.pdf
    • http://files.gavshistorygirl.com/uploads/1/3/2/6/132696233/186620.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6202/files/noaa_severe_weather_storm_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/nofejufevigefukupena.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/romidotavopisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/accounting_services_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/dixuvumatodojolexobapunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/43963810354.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1387/files/57304302496.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/38518215459.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/7113723658.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/wigujofatomomofowolidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/mucosa_associated_lymphoid_tissue.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_off0001621e.bin
0919f3410e4bf3897720f2f56e92bbf777c83cc903aa4c10ee45f1cb7a3fcde2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1621E 5252 bytes
font_01_sfnt_off0001740d.bin
7096d7da60a314103653935530ac3d5543250d5ad3694c22799953f83bd5ff74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1740D 14724 bytes

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