Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dc1f1c9034806d…

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 13:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1212e68721e2c1a6ae96e3e7a5f6908 SHA-1: 394431b1c13f153813a021a61559409d36ebff83 SHA-256: f7dc1f1c9034806df74542e0316a9880279880007cdf9c56c22f0b16fbcaf340
150 Risk Score

Malware Insights

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

The PDF contains a link disguised as a certificate of participation, which redirects to a known malicious URL (ttraff.me). This indicates a phishing or social engineering attack aimed at redirecting users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=sample+certificate+of+participation+pdf
    • https://static.usrfiles.com/ugd/ab922d_1f8d83903a014f2c97fab713066686cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_b045058898184f6b8774cabba4cb35ba.pdf
    • https://static.usrfiles.com/ugd/67f5f7_0c452811fe6849388c776e7cee47e02e.pdf
    • https://static.usrfiles.com/ugd/a43ec6_392e07b9d504499ab633bf230e0f3a72.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/communication_skills_worksheet_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0469/9317/8776/files/bailando_english_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/lusudofodobevidewawar.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/kimupavoxisujutudukix.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/5164979740.pdf
    • https://cdn.shopify.com/s/files/1/0457/0411/8428/files/welufa.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_off00006604.bin
a03de99b367e351304f4f36cd71c03802a3ee9c24951e512866ab0e3d8450948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5228 bytes
font_01_sfnt_off000077b5.bin
5276fdd1ac5b74896f024cbf2a1364556ce8a08fb079046ffc7d15c59a1bc6aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 9884 bytes

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