Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ddbee81eaf759b…

MALICIOUS

PDF

48.1 KB Created: 2020-07-26 22:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b17465ed23c37cf79a8216690765d787 SHA-1: 20d0be83cd9e5dfb2a3d47606756a955ca0a08d5 SHA-256: 33ddbee81eaf759bc1ea4c90d6bdac24ced4f4f51b0d48d9eaa99e972c951168
136 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting PDF files. One critical heuristic indicates a PDF redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though heavily obfuscated, contains phrases suggesting urgency and a call-to-action, aligning with the heuristic firings for SE_URGENCY_LURE and SE_DOWNLOAD_BUTTON. The primary attack pattern involves luring the user to click a link that redirects to malicious content.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=technical+drawing+giesecke+pdf+free
    • http://files.forhealthierchildren.org/uploads/1/3/1/4/131406288/5f8cc070565b7d.pdf
    • http://files.vladvieru.com/uploads/1/3/0/7/130776485/afb7589728a.pdf
    • http://files.dharmendhaliah.com/uploads/1/3/1/3/131380899/427d7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mukevomisuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/muzanemagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/jowipogamigomenodufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/vutumuzesifuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/fopebixosar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/bujumeliwafomudupizali.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/gekibefadimusetarosurerex.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/3179115928.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/ladum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/6910565719.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/19728698051.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/kemolijo.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_off00007fcc.bin
2dc6d0a189627b4458035ec0c97a614586e5529c2e5f842a62e6588e5e5e6849
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCC 5120 bytes
font_01_sfnt_off00009133.bin
bff54d51aad3340a788d37793ab4793f493e526c850e1f0e646f9d61283a1ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9133 10100 bytes