Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1bd5a6deec4de0…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 20:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c5471101bc9d760a08a9eb08d5bd1c4 SHA-1: b4cc6358574fa6e3a942ff37fb2f4f0d688c29a2 SHA-256: af1bd5a6deec4de04b0792836a2954fbf017dbee82a58073c742d9da9c78503b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=candy+crush+game++apk, suggesting a lure related to a game download. The PDF also contains a PDF_SEO_LINK_FARM heuristic, with numerous links to Shopify-hosted PDFs, likely for SEO manipulation to improve search engine ranking for 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.com/pify?keyword=candy+crush+game++apk
    • http://files.physio4athletes.com/uploads/1/3/1/3/131380558/b4626.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/96797586695.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/97196290938.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/1830353686.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/lupolujanoregosojesorek.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/makirafoselewed.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/kizovipedawik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/99379885566.pdf
    • https://cdn.shopify.com/s/files/1/0435/2838/8767/files/29209903232.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/90778619328.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/zimozifewo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/40762320347.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_off000068e4.bin
cec886f94fde68a159e9f74214c27679b2c8d148b7bcd9538bbc91dfad1308bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 5528 bytes
font_01_sfnt_off00007b8b.bin
b27f1705e6eec70197c911538c2f89fbecc9ee105a3174dd258bc7d5160ca7da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8B 10684 bytes

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