Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb45a4046097c045…

MALICIOUS

PDF

49.3 KB Created: 2020-08-17 02:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56acb78ef2eecdc80ed88fb7fc3af948 SHA-1: d240b16c0d031a7352c4c0eeec264d83a2a4798f SHA-256: bb45a4046097c04577017816f7873d24e557b7092a2676f1c3aea39266e629c4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=solubility+product+constant+lab+35+answers'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0436/9232/7077/files/change_font_size_html.pdf'. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into clicking it. The primary attack pattern involves social engineering through a deceptive 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.cc/pify?keyword=solubility+product+constant+lab+35+answers
    • http://files.pembrokeshirenaturalburials.co.uk/uploads/1/3/2/6/132695601/9854324.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/change_font_size_html.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/old_tv_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/57449514470.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/difazizokixij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/gazelle_power_plus.pdf
    • https://cdn.shopify.com/s/files/1/0438/5672/4128/files/dikigeboran.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/
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c39.bin
1e6035dbb2f0103504d9dbd6ae505e31ccd4cb8eceac51460dc7b17c3de6d5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 5792 bytes
font_01_sfnt_off00008004.bin
e8cefdf02861df7b60f4a313e6802e3141eae36aad8ecee3d6b262b72349bc46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10280 bytes
font_02_sfnt_off0000a355.bin
dfdc6983d3c42b81f9741fa6cdceaab3e97c1fbda00e6274acf933e6ff911e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA355 16100 bytes

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