Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b2cc1023a63b51…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 01:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f8f826d2c7a9bf4c12c4cd032c58fa6 SHA-1: b47a09016781ec23f5a45152028f78a01cd7198c SHA-256: 94b2cc1023a63b517b14538732d8dfdc1598f33b9b2d5aacd9446146a170909c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=convert+pdf+to+svg'. The document body, though heavily obfuscated, contains text related to PDF conversion, suggesting a lure to trick users into clicking the malicious link.

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/wix?keyword=convert+pdf+to+svg
    • https://static.usrfiles.com/ugd/b8c837_21106e17e4e34c569abac13d06c60374.pdf
    • https://static.usrfiles.com/ugd/b8c837_503930efaa134338ab701eb24487daf0.pdf
    • https://static.usrfiles.com/ugd/72216b_786bd6fc9ed84ee6a365b8ca9578d05b.pdf
    • https://cdn.shopify.com/s/files/1/0452/0306/2933/files/nixapuzogoruge.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/87686082935.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/ashanti_only_you.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/92858162445.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/56876201685.pdf
    • https://static.usrfiles.com/ugd/16a96a_1404c7aa9aa744e1a5bf6b47b7db3ad3.pdf
    • https://static.usrfiles.com/ugd/97634b_24535f0bad00452d80e83b348e62effc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/vuwowesovajutefokirep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/que_son_coliformes_totales_en_agua.pdf
    • https://cdn.shopify.com/s/files/1/0431/0502/6199/files/enteral_feeding_guidelines_daa.pdf
    • https://cdn.shopify.com/s/files/1/0443/9130/1286/files/apdcl_advertisement.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_off0000511f.bin
08a85a5ddeb2c0e1f34bc6f4b8836c2195bd0318108c6b18c59542aba136f7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x511F 4932 bytes
font_01_sfnt_off00006205.bin
66e84e85aad6ca9b386b973a02c10f76629ac796bd602e22886ee9b5cb533eec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 10068 bytes

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