Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bbdce03ab7c763…

MALICIOUS

PDF

45.0 KB Created: 2020-08-03 13:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9024a21ccf1b7609e56e11a3aedd2469 SHA-1: 24e62ddd71f021d1255756718ae42a01abefba28 SHA-256: b0bbdce03ab7c7631cdf59e7301dbc6fcdaa63cd6c3669196c8347b1d987bfdc
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=inverse+of+3x3+matrix+example+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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=inverse+of+3x3+matrix+example+pdf
    • http://files.maureenennsstudioltd.com/uploads/1/3/1/3/131379213/jejowirazeboz.pdf
    • http://files.clontarfbuildinghistory.com/uploads/1/3/0/7/130776674/sofidok.pdf
    • http://files.aparkerdesigns.com/uploads/1/3/2/3/132303194/40fa878e9b4b3ea.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/loguluxumaporor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/93807166168.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/nudus.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/upper_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/vuferegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/21819247200.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/45918716123.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/konow.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/50371671131.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/81742847376.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/56565368093.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/3554908753.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_off000065d2.bin
fa1ef0da1499627dfc46558730bc9f57269d0f18915d15e38b16789ee4e8b690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 5416 bytes
font_01_sfnt_off00007830.bin
6f54e0a55d29f4c8cb12e44980bd72e3be8cb8c51c65a5e639cb386043267bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 15176 bytes

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