Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53362ea03a21e2e…

MALICIOUS

PDF

39.7 KB Created: 2020-09-02 07:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8691d09da92805ff121cd9b02f7a2b35 SHA-1: 1529da3389adfe0f2b910b8ad48346b98b3e89dd SHA-256: e53362ea03a21e2e343f9810d331c9b2b9bc750522526603e76f99bc84df7b7a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=akkurat+light+pro+regular+font'. This URL is likely part of a phishing or malware distribution chain. The document also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of SEO link farm abuse. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.me/wix?keyword=akkurat+light+pro+regular+font
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/86754976581.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/fodmap_restaurant_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/secrets_to_winning_at_office_politics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/josabiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5402/files/foludolesiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2347/3560/files/business_english_pod.pdf
    • https://cdn.shopify.com/s/files/1/0461/0955/6899/files/kedoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/58389898430.pdf
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/gofowomufate.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/kutopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7293/files/grade_5_math_equivalent_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/88336097797.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8589/files/find_duplicate_rows_in_excel_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004874.bin
5ebaa4fc4a041d7e2d9407e355ad4005f2192f7fe0d5785f6b9238e9b7a3fed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4874 5040 bytes
font_01_sfnt_off00005997.bin
86fb30a61b4f4dd4e94e7fe60fb6d52aad521830c2dff6c02159f940534501b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5997 10372 bytes
font_02_sfnt_off00007d0d.bin
a3b8ae6cb61a975f1aaa3bdf1d75290c2750726bc6c8d8b6ec62e4e9f5cc9978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0D 16084 bytes

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