Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de6254ff7d10361…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 03:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ec8a2792e71e1c20bbe12a0c6973e6 SHA-1: 3248151ee9aff55b10795885f1b3bc4df4b57231 SHA-256: 7de6254ff7d1036160a5b846c4cf2043fb32d8216c0f4e05fa2e881955d5d16a
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.ru/wix?keyword=urology+cpt+codes'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0437/2008/1563/files/electrocardiograma_normal.pdf' being the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting an attempt to disguise malicious activity as legitimate document content. The primary intent appears to be redirecting users to a malicious site.

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.ru/wix?keyword=urology+cpt+codes
    • https://cdn.shopify.com/s/files/1/0437/2008/1563/files/electrocardiograma_normal.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/49849228259.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/kaxoxidefimagugawuwusura.pdf
    • https://cdn.shopify.com/s/files/1/0445/8142/1215/files/theoretical_studies_in_islamic_banking_and_finance.pdf
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/ludifujabek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/nodunarapilogumoliwiv.pdf
    • https://static.usrfiles.com/ugd/97493d_6ff756ed521044f9a42d20c3ce6d0336.pdf
    • https://static.usrfiles.com/ugd/47b1e8_e80933f98d5d404f82efad7e64725783.pdf
    • https://static.usrfiles.com/ugd/b88e3d_0887284b1f4947d1b601842bfab3e367.pdf
    • https://static.usrfiles.com/ugd/5e8de6_4a38619b2df445b39825466844215496.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbecc9a1d58c46e9b45e70e6f34fd5c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_bafe44b636f941a88a8734836f0c4a9c.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_off00005dac.bin
450ab9022271cf649a367c6ab9c503d633fe3e38fea439252b8e5f9621e160f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAC 5124 bytes
font_01_sfnt_off00006f33.bin
543cc9bd7c4f2943c1cc92f98b0525a31d10f5f773a6a142129f2a8379c4fe89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 10928 bytes

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