Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c884b6b3648a96…

MALICIOUS

PDF

47.0 KB Created: 2020-08-06 06:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03e3fad5922639182c45b46ab91b70e2 SHA-1: d9ddcefb171238002ea45d299eba58149ef91e7f SHA-256: b5c884b6b3648a966ba6b102eaf9e2f70a06ba6f256d5a0800d469c6ba1b4500
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=pdf+file+convert+to+image'. This indicates the document is designed to redirect users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting a broad distribution attempt. The presence of a 'download button' lure further supports a social engineering attack. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+file+convert+to+image
    • http://files.costavistachiro.com/uploads/1/3/0/7/130740165/f9ed83427aa14d8.pdf
    • http://files.terrysitz.com/uploads/1/3/0/7/130775760/3816108.pdf
    • http://files.redonesmarketing.com/uploads/1/3/0/8/130814014/duvapig_pejar.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/5948317548.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/lilemigizez.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/21232577067.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/slack_emoji_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/53466512905.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/xozuwirijavaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/kajib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/tejoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/kodufugenodugojavo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4065/files/41937545979.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_off0000793f.bin
dcee95b1dc6cc99132eceb77438ee8b086e62605606b7494e115942dd3b0c7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 5224 bytes
font_01_sfnt_off00008af8.bin
8912de0df78e9e7fa2b16c30e27c39eeafe8e78a0faf25c950b220800dcb0177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF8 10720 bytes

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