Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38825ca28ed6799…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 23:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0bcb1623bbd8bb83f742831f867014e SHA-1: e789001529dfe2ca763f7b20971b8957d7d9a44e SHA-256: a38825ca28ed679924adf4eb0250a65f5491eb9a5f8d8389739d4050fcd2d47a
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=cours+tournage+fraisage+pdf, which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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/wix?keyword=cours+tournage+fraisage+pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/55381614624.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/biblias_de_estudio_gratis_en.pdf
    • https://cdn.shopify.com/s/files/1/0448/0453/8528/files/58097525749.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/bailey_and_love_26th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/varifoleda.pdf
    • https://static.usrfiles.com/ugd/89064d_43188c712cd8459292e0fa304777984c.pdf
    • https://static.usrfiles.com/ugd/b8c837_165ba7408e5c438182cb6fd99e60f9c1.pdf
    • https://cdn.shopify.com/s/files/1/0432/9596/5352/files/sewevarunifezaval.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/29873429086.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/antenna_theory_analysis_and_design_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/causas_de_anemia_megaloblastica.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_off000060a0.bin
9292896f59acc5e667fdece7b3c4c3aabd9e228fe5f02e2502e9db9038dbcdd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A0 5084 bytes
font_01_sfnt_off000071fa.bin
0210f8a819635f58c7f26effcb59ccb0523a9961a8ffd295c9abbaaf973d530d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 10244 bytes

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