Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f12e0d547a537b…

MALICIOUS

PDF

70.8 KB Created: 2020-08-29 20:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebaf95fad7e6d87ebf667fecd04a939f SHA-1: 05e58dd3a6102bce6ef46e8ccc283703aff86c7b SHA-256: 81f12e0d547a537b72f220b06d1cd7eb3766a456755b2d2a33ba4401541aa430
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download button. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to increase visibility. The embedded URL in the document body, 'https://ttraff.com/wix?keyword=free+12x24+shed+plans+pdf', is the primary indicator of 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/wix?keyword=free+12x24+shed+plans+pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/a_heart_that_forgives.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/50064350037.pdf
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/boverusoxaxumidevekol.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9a87dbf2e664bdab103f1c35b27ef26.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d79861854824991adbe7d2eadd95e92.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_a5a8b1e593a840e18c41fd480fd2b2ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_75c628a5be214b1691c4ee4cf0d159f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bf05d33aec643fbaf93c37a4d577458.pdf
    • https://static.usrfiles.com/ugd/599026_41f0cdfad01641088cc346f6625a2c31.pdf
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/tesaxodudozuvukozewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/rapas.pdf
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/auction_definition_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/runegefowoderusemuzibujiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/senazopasunakon.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_off0000da33.bin
7770c555ec2ad17316f80aaab02275f081da35669ce7722fa39ea05458e0cc0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA33 5424 bytes
font_01_sfnt_off0000ecae.bin
b6f5ee3aad239d91e39a8e5cfcf235e27b1f3e185e77053c3134fe9eb6ad3f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAE 9856 bytes

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