Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe756c6e505fd573…

MALICIOUS

PDF

47.8 KB Created: 2020-08-30 04:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e487c8afaf8083657152d7ac4e7dc9 SHA-1: 3f8d7459df83766689d9c36a4aac63fbe1713c7f SHA-256: fe756c6e505fd5732675eace4b1d339f2cd4de3fb867252003279869aca9000e
120 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, pointing to 'https://ttraff.cc/wix?keyword=catalogo+libros+del+rincon+2010'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering, luring the user to click the malicious link under the guise of a book catalog.

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/wix?keyword=catalogo+libros+del+rincon+2010
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/15427463803.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/20415050570.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/38510567428.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/80977994440.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/wasovozovafogekitema.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/pps_labels_14_per_page_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/76819875213.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/66616273742.pdf
    • https://cdn.shopify.com/s/files/1/0439/6548/1118/files/12541640580.pdf
    • https://cdn.shopify.com/s/files/1/0435/3979/2021/files/7th_grade_math_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/fipesejegofekagup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/pay_pal_fees.pdf
    • https://static.usrfiles.com/ugd/0049ca_2a6dbe7873f340bd91fd5a12cdbd7c1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1df06a60e2a0448bb8c8dd8cb523d366.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e24c6fa2c754dc99b2900516f28e6c8.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_off000068d3.bin
2d75c215830edaaa5f0c557b03958364460d0ba14eba85ba2847f03fc058681d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D3 5480 bytes
font_01_sfnt_off00007b85.bin
5087802f5e161abe0db3556b69eb9ab25b744ece8d01ffdb2d919ef14f702887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B85 18032 bytes

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