Malicious PDF — malware analysis report

Static analysis result for SHA-256 303d7bea13b4999a…

MALICIOUS

PDF

41.9 KB Created: 2020-09-08 04:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7401bff38a719b1557e17bdbb149f5 SHA-1: df6ffaeb1ea97e340ff42325401d561fba748641 SHA-256: 303d7bea13b4999ad6104194011423911f542bfdd4ecc625035110db05e96bd0
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and references to a 'resource guide', suggesting a social engineering lure. The presence of numerous embedded links to external PDFs, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=new+york+state+humane+education+resource+guide
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/wuwumivofutumako.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/xedofememalenifufasurol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/82650150882.pdf
    • https://static.usrfiles.com/ugd/a44510_a113b4c81a4247edbc6fbdab90afa9ba.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_7e2fdfc54bf34772af2394ae2db3b1be.pdf
    • https://static.usrfiles.com/ugd/74147a_35b2fdcc00814c17bbfc4e397ed45381.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d57cba6b310472eacc6fa0700ae7b31.pdf
    • https://static.usrfiles.com/ugd/405339_acbf5c0316ca4572bb25d0f91a8edecd.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/1173043441.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/18274432911.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/gudaxifadememijineke.pdf
    • https://cdn.shopify.com/s/files/1/0458/0881/2198/files/chimney_sheep_size_guide.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/
    • https://cdn.shopify.com/s/files/1/0430/1740

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006482.bin
a24d96812e182aee84777908265fa63c2a5d74dcd27bb1018e95434e7b7a3506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 5548 bytes
font_01_sfnt_off00007759.bin
4cdbaa485a171d6478af866115746389b3db0277257cbf4bfbc10889f04dae66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 10324 bytes

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