Malicious PDF — malware analysis report

Static analysis result for SHA-256 571c813cf12f63c5…

MALICIOUS

PDF

47.2 KB Created: 2020-09-20 06:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986a16615302d271f1944450083fe874 SHA-1: b8eeb185e14adeed5b8f5766ceacdb207c394650 SHA-256: 571c813cf12f63c5aa3e4554c1fa02d5d6ca42c1da1aa969842ab612ca555d74
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.link/wix?keyword=how+to+draw+arrows+in+imovie', is flagged as a malicious redirector. This suggests the document's purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=how+to+draw+arrows+in+imovie
    • http://files.root-and-branch-editing.com/uploads/1/3/0/7/130739783/c49f6.pdf
    • http://files.amylouise-psychotherapy.co.uk/uploads/1/3/0/8/130813079/7cac42.pdf
    • https://cdn.shopify.com/s/files/1/0449/5353/4632/files/53313972397.pdf
    • https://cdn.shopify.com/s/files/1/0433/7414/9793/files/katuzawifidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/kadoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/bioshock_2_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/soburewafilumivarovixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8200/6171/files/mewij.pdf
    • https://61eb8066-2e08-4fbb-a141-f54dfc7a2ec5.filesusr.com/ugd/b5973a_f440b297a1d94ab6b170443b57541faa.pdf?index=true
    • https://bb8bfad3-1ac7-46b6-8f29-962e3fef14d3.filesusr.com/ugd/1d3654_2766571a8a414c74a30fe37921ba3f7b.pdf?index=true
    • 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_off00007c24.bin
16a7927bb5220d72565eeda657bc35db21231e39682c3c9b901da1d5b76726d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 5052 bytes
font_01_sfnt_off00008d4c.bin
efd2c150b4e781d6e5542b9dce6c23dcee383a9f8e63255fc29dd8a0b7ab8ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4C 10284 bytes

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