Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8387322e55615b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 05:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 628cfb8e606790f0da2236599299e318 SHA-1: 37eafda86907565abaee7ef5bf30027e0626c588 SHA-256: de8387322e55615b9bef47aefa06deb8991bf30c752c7396b0e2f8427577d4fc
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure (https://ttraff.cc/pify?keyword=dbfz+broly+guide). The document body, though heavily obfuscated, also contains this URL, suggesting a deliberate attempt to lure users to potentially harmful content. The presence of many Shopify-hosted PDF links further supports the SEO manipulation or link farm hypothesis.

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/pify?keyword=dbfz+broly+guide
    • http://files.washnword.com/uploads/1/3/0/8/130874205/3502209.pdf
    • http://files.miguelemoovie.com/uploads/1/3/2/7/132712057/3fa7605.pdf
    • http://files.michaelsautodetailing.com/uploads/1/3/1/6/131637163/b44f5.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/88082013807.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/pkhex_for_switch.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/noxerazupum.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/adjectives_worksheet_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/rozerikituwidiseluvud.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/tamosenamebesekug.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/jedatufapumamititino.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/77141901870.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/gatiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/64553356359.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_off00005e16.bin
f064ed1709e92adde91b10ff2bff0a22b588fc6767c4ba39bd9dd869eba44f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 4980 bytes
font_01_sfnt_off00006f26.bin
7cee8c002ef55e399b56e7ca5a43950dc050ec7861f4011331f3098c524c4336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 9856 bytes

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