Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf0dd0dbc99ed63…

MALICIOUS

PDF

41.2 KB Created: 2020-08-16 22:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcdc249ae3016bdb2490386f076b23f7 SHA-1: 186e83d0a20bcec2fc0eb1549a9db1ad0aaebaf7 SHA-256: 1cf0dd0dbc99ed631906b15886ed8fbae1644877b6aa9b7afe07d7c603670434
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a SEO link farm, with numerous links pointing to external PDF files, many hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=3d+text+effect+photoshop+action+free, which is likely used to redirect users to a malicious site.

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.com/pify?keyword=3d+text+effect+photoshop+action+free
    • http://files.sydneyschmeltz.com/uploads/1/3/2/6/132695200/8191925.pdf
    • http://files.sankofatuzinde.com/uploads/1/3/0/8/130874361/kepoxalidamoxemula.pdf
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/bookmark_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/71654799333.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/wegowobopen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/tevajewisusezixagidenupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/turezadejezerabit.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/9098774501.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/cable_tray_accessories_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/60603981725.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/bofigetolopo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/wizafinebepowitejikagejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3795/files/gewimaronowev.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_off000064a9.bin
f55159575fa8533a29b48ee5db27c09176cbd10e641e4738ab2611d872b93a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 5348 bytes
font_01_sfnt_off000076c4.bin
d947dcadd9c41e356f9df3dededf22565eb8520197f181cf84cf3128be4cd315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 9788 bytes

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