Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a3728073a254c8…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 22:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3e410414ee25713a3509220081cbcd2 SHA-1: 91af237224c506929b48a49a72310b19a5e16964 SHA-256: d5a3728073a254c8ffb5ddfa062f8a504109d60083494f172f4a6f9ec82de873
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as tablature for 'Hotel California'. The ML classifier strongly indicates maliciousness, and the PDF structure includes a mass of external links, many pointing to Shopify and static.usrfiles.com, likely for SEO poisoning or to obscure the final malicious destination. The primary malicious URL identified is ttraff.cc.

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.cc/wix?keyword=tablature+solo+hotel+california
    • https://cdn.shopify.com/s/files/1/0437/0766/2490/files/59326711332.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/zavikez.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/bebisozuzidasoso.pdf
    • https://static.usrfiles.com/ugd/5b9a87_1a18466929be45ac9d110f2aed8b3ade.pdf
    • https://static.usrfiles.com/ugd/b8c837_4646e54ddc0649e38460ee08418bcde8.pdf
    • https://static.usrfiles.com/ugd/b8c837_438e1362bc0744e18a14f7939ea4c637.pdf
    • https://static.usrfiles.com/ugd/d01287_6fc1c89bd5e34615be41754b5cb7ca73.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e7e3e65401943a5aa08e868718d254c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d862d8c369b475b88e180046f18280d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f473a4c9cbd24e5c98d85ae586332a7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_65a89d287a984481afab65a9a83a6242.pdf
    • https://static.usrfiles.com/ugd/4b874d_c1752e8adf2a4ef484cd73d527c00f00.pdf
    • https://static.usrfiles.com/ugd/fe83c3_b504d311f85145ec94712ab8458db033.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_50706eb64d214692ac69664fb315d6d9.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_off00005b70.bin
5f70503da7f06a2add34b4e59d6a50bac69870ecb360e1ad722e8cd7fba01d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B70 5060 bytes
font_01_sfnt_off00006c9c.bin
2ceae09c89fb51473e608343d40ebec445f401dc8a9cbc2e896e92466374e9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 10732 bytes

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