Malicious PDF — malware analysis report

Static analysis result for SHA-256 a923203b53fdf3a2…

MALICIOUS

PDF

35.1 KB Created: 2020-08-18 22:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d518109de90009dbf0c32132c56308d8 SHA-1: f23f37d7b3eaa8ba90c7c8a9b346ee5637256f85 SHA-256: a923203b53fdf3a268bbc5a9f495409c490a545cda9a75e79e048b362bc2e175
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector, specifically `https://ttraff.ru/pify?keyword=bleach+vs+naruto+apk+3.+3`. This URL is presented within the document body, disguised as a download link for an application. The file also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to `cdn.shopify.com`. The presence of a visual download button lure further supports the malicious intent.

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=bleach+vs+naruto+apk+3.+3
    • http://files.innovativetruth.org/uploads/1/3/1/8/131871705/6504779.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/python_combinations_without_itertools.pdf
    • https://cdn.shopify.com/s/files/1/0438/0151/0045/files/dafuporewageza.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/wazafinuviwunad.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9189/files/html_page_to_jquery.pdf
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/clear_variables_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/safety_award_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/jquery_validation_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0438/1150/4288/files/picsart_app_for_pc_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/ansys_workbench_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/arabic_proficiency_test.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_off00004c3d.bin
834eb69e665afe194205d9c3e4ab80712fac4a78f2d43080c961d9c724a01546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3D 5388 bytes
font_01_sfnt_off00005e89.bin
10053ae6fdff2fad30fc7d6e53330cb8d945725a87733af63181c3da219a7b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 9868 bytes

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