Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b0a5c9d2ce2f17…

MALICIOUS

PDF

32.5 KB Created: 2020-09-12 06:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d26cac372993927fcaa6ba8fb7f5a1 SHA-1: 30e06ebc5b16db7c09c779b53c601bf6977c7f47 SHA-256: d4b0a5c9d2ce2f17ceddf29525d031adfcf20ad5b897658cb3f4a6d68d575edc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=irritating+alarm+ringtone'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to external PDFs, many hosted on 'static.usrfiles.com'. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text and the primary malicious URL, suggesting a phishing or malware delivery attempt.

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.link/wix?keyword=irritating+alarm+ringtone
    • https://static.usrfiles.com/ugd/e42ee3_bbfe4036ff9441bb85092cd07fd59c6e.pdf
    • https://static.usrfiles.com/ugd/d7d6cd_a8ee6e8021aa46a8a6e6cf201489b72d.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_71999fdbb7494ef1b993d3efb8fc32e3.pdf
    • https://static.usrfiles.com/ugd/5bf82b_cfbee803c5d44b90adf32511b34348dc.pdf
    • https://static.usrfiles.com/ugd/1ebe14_29951e939e524ce28f5faae8f531ba0b.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/following_directions_worksheet_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0438/2657/7565/files/85186214554.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/pulivasukafuwedujo.pdf
    • https://static.usrfiles.com/ugd/1f6d71_cb4f0f7fc1d04670a9b6c9790c4ae603.pdf
    • https://static.usrfiles.com/ugd/8d57bd_1f38481ebf6641e5be491d06e2e59c6b.pdf
    • https://static.usrfiles.com/ugd/cfa91a_716ddf074abe4deb83071b3216d0d79e.pdf
    • https://static.usrfiles.com/ugd/f9fac6_88b9cbd4627241de8c8c122393ac86f9.pdf
    • https://static.usrfiles.com/ugd/5dc3ca_394c30bc542e4e70bd9faa9ee4917bf5.pdf
    • https://static.usrfiles.com/ugd/6c8f37_eca73af188f1421d8fb58821d3ed13f8.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_off00004519.bin
0433e594eb9a426cbb4fdf88709ed599d779b027ec1344c5221df93de11e6f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4519 4764 bytes
font_01_sfnt_off00005530.bin
941df3e4123ca76b528a50e1241d57db18580dc7807ca64a341da76385ceeda7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5530 9592 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.