Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ef62da26116e6e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 22:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c52218de597b258f774cdab77aa864d SHA-1: ad1f2dd49f24f3ad83db2ead50d319b5f2af4703 SHA-256: 34ef62da26116e6e828cfafc61babdc456ac8287153aa01817db8af1f5ef2b8d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with one heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=hernia+hiatal+clasificacion+pdf', which is also listed as an IOC. Another heuristic identified a link farm pointing to numerous PDFs hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The primary attack pattern involves luring the user to click the malicious redirector 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.cc/pify?keyword=hernia+hiatal+clasificacion+pdf
    • http://fujazu.opa-robbys-marketvirtual-shopping.com/uploads/1/3/1/6/131607575/gexelowuxerojijepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/59980691873.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/autocad_shortcut_commands_in.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/vowoxibedofox.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/wiposufikulera.pdf
    • https://cdn.shopify.com/s/files/1/0443/1645/9164/files/atul_prakashan_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/pitepivakonasewes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/48772015164.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/buku_hak_asasi_manusia.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/wilasuzepe.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_off00006cbd.bin
0ac52f456c7464ae33988c451bffba63139ba5906bee66e8573db5c7c2b601ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 5204 bytes
font_01_sfnt_off00007e59.bin
c2849110918cf98b792fe591ac55f270ee6b7cff31ae9cabd7f55469b911f3d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 10256 bytes

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