Malicious PDF — malware analysis report

Static analysis result for SHA-256 41db608ad25d059c…

MALICIOUS

PDF

39.2 KB Created: 2020-08-31 20:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52033e41776ebd0412a847fe2c4bd06b SHA-1: cb511a8e8a4bad09086c669f7adff6b0adf8c2d1 SHA-256: 41db608ad25d059ce97ef13cd9bbc7ba0625a5bb1d950e9d06b0fefcb4968807
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a prominent link disguised as a lure for free software ('Free antares autotune for audacity'). This link redirects to 'https://ttraff.club/pify?keyword=free+antares+autotune++for+audacity', which is flagged as a malicious redirector. The document also contains a large number of other links, many pointing to Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the primary malicious behavior is the redirection via the embedded link.

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.club/pify?keyword=free+antares+autotune++for+audacity
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/10064118643.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/aheadworks_advanced_reports_magento_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/nosler_reloading_data.pdf
    • https://static.usrfiles.com/ugd/b8c837_11cf90d9264a4d69bbb1320605358a50.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_4939d3fe85b44b8cb9767cce99b6342a.pdf
    • https://static.usrfiles.com/ugd/b8c837_496b057afb8d4dd8bef8a6d1c2d62ece.pdf
    • https://static.usrfiles.com/ugd/191a6d_ef653d4e89da4beb9ae05751044d50d9.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/android_game_hacking_tool.pdf
    • https://cdn.shopify.com/s/files/1/0459/1468/5589/files/55857507967.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_off00005c9f.bin
bffcff7064958d6a3f64fbdb874ed1d5dcaa504892f6ae01d8939fa5676260b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9F 5040 bytes
font_01_sfnt_off00006ddf.bin
632ffa8dced01d4fc4025d71c6488889b0699bf1eaf80518bab2436f6b60c603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDF 10152 bytes

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