Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6df5af8485af09…

MALICIOUS

PDF

37.8 KB Created: 2020-08-26 17:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff3db12bcc3211bcceef2aca83da5ba SHA-1: 19d07432e8a4136aee38fe7f4c808d3b80cbb32a SHA-256: 4f6df5af8485af09e3cd5b25f2dad380e2b6a6c98bfadaf44aa6e400b1d4f4c0
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same redirector URL and several other PDF links hosted on Shopify and other domains. This suggests the primary purpose is to lure users to malicious sites through a link farm.

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/pify?keyword=the+jacka+discography
    • http://kijedet.eestilodevida.com/uploads/1/3/0/8/130814515/39f93acb.pdf
    • http://files.burdickequine.com/uploads/1/3/2/3/132303229/ad7c17645a.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/30267826499.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/17982721812.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/jurnal_astigmatisme.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/73097817686.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/9431253107.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/cardiac_arrest_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/mixekap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/39025673194.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_off0000527b.bin
6910f487a2d644b0755977b33249716c54a10ef15d7af54d69dc26ba6f073230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x527B 5492 bytes
font_01_sfnt_off00006537.bin
da5e56c353cfc75b60bb0967170df89ced23c2ae430a6ac5e14e33d4110641a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 11464 bytes

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