Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f41ee0e678b4a4…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 05:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3b5aba61aa936f277d9e73efcb79d4d SHA-1: d9c6a849ac7784b3a1b270c67b80b5ea374fd149 SHA-256: e9f41ee0e678b4a43473dd40a095e761ef2a251865363ae63e87994e0805456a
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=bruel+kjaer+pulse+labshop. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to host further malicious content. The presence of a 'download button' lure reinforces the malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bruel+kjaer+pulse+labshop
    • http://files.loomacresmobile.com/uploads/1/3/0/9/130969826/2836856.pdf
    • http://timakif.xfinitydesigns.com/uploads/1/3/2/7/132740515/fobej_xidasesum_nufatisij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/52704707389.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/adding_and_subtracting_exponents_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0071/files/jojituluvagizajovud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/54792635601.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/adicionar_assinatura_digital.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/selowetalurur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058d3.bin
f3f54f3fe42421ae811008f48904bf95fb42d3ca554ec406901558365e13d78a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D3 4884 bytes
font_01_sfnt_off00006980.bin
ff3c23b39335bc4d06437f6d7832281e88a255e288ecd04e14e5afbfdb0c3082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 10208 bytes
font_02_sfnt_off00008c83.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 4324 bytes

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