Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dff2b74e740093…

MALICIOUS

PDF

38.7 KB Created: 2020-09-02 10:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b53667370cf2bbd56b6ab6e9f471e5fa SHA-1: e72663236e3bfe2cdb6461d82b1b44502fe8d2d8 SHA-256: e1dff2b74e740093b6e29b4459af91bb156906f259128f4cc2d7c19af571da40
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, presented as a 'Magento 2 installation guide', redirects to a malicious domain (ttraff.club). This indicates a social engineering attack designed to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=magento+2+installation+guide+ubuntu
    • https://static.usrfiles.com/ugd/b8c837_9336957ca8c0459e9f0b73704def7569.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d21a658984f4fb79cb4a9b194336208.pdf
    • https://static.usrfiles.com/ugd/824332_b48fb57ea2744f22a57c53cb6a3b5013.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_17675e51ae95477f80342ee9b7cb4029.pdf
    • https://static.usrfiles.com/ugd/b8c837_16b52d1e7e444b0396e282047c1fca6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d36efc66e1ff4671935da6f60229f0b9.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8589/files/find_duplicate_rows_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/7712/1686/files/lulut.pdf
    • https://cdn.shopify.com/s/files/1/0459/9296/8351/files/vifaxatubapavisuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/battlenet_stuck_at_initializing.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/68527881020.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_off00005956.bin
365c6d17c74768a7eec2e74987a3917b0b8ba55d7952c3d4b7f2608fb788dc6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5956 5172 bytes
font_01_sfnt_off00006b0a.bin
1fa0567903ef5b995dda9882c0c064fe4334baf7c787bca30292353d71f7ee6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0A 10324 bytes

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