Malicious PDF — malware analysis report

Static analysis result for SHA-256 931890c53dd6ffc1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-15 05:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d22016686e710a960cd6c7b7529a58 SHA-1: b7b9fd7808667039590e33c3de4ce777e7b32f8d SHA-256: 931890c53dd6ffc1d8c8652bda03f72a741e8da9a0bde7ce5f3b026e0caa2759
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=android+mobile+automation+testing+with+selenium+webdriver`. The document body, though partially corrupted, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links hosted on Shopify indicates a link farm strategy to improve search engine ranking or distribute malicious content.

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.ru/pify?keyword=android+mobile+automation+testing+with+selenium+webdriver
    • http://files.stemstudentinfo.com/uploads/1/3/0/7/130740011/lifed-gudegovipinoje-sevikizesezilu-doxopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/wogiwisegetizafurewatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/8567581830.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/rasokil.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/41810880005.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/bronkitis_anak_idai.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/sukixutobodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/sizamozetofomimapozumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/sudeganeviba.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/jebilepaxub.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/dapisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/misewudobe.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_off00006a36.bin
b620769ef055d0203577b0db24f8df1e26df791e219c98c10d5866e76e2167f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 5520 bytes
font_01_sfnt_off00007cd9.bin
7a18cfd6fefe04655b214aa93f29d347b67f64607a90b2f4bdf6b2bf694a0517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD9 10972 bytes

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