Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f93a86f78e7bf81…

MALICIOUS

PDF

61.4 KB Created: 2020-08-04 22:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 711d058a38772a78c6870053d96608ae SHA-1: dc69688601eff0cd86d2e8184df4de8c7c12ecbe SHA-256: 4f93a86f78e7bf811960016f258eb216a2ad39b53aedce5ca60cbba0034ec33e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains text that suggests it is a schedule PDF, likely a lure. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure, and another heuristic identifies it as a link farm designed to distribute external PDF files. The embedded URLs are likely part of a campaign to drive traffic to malicious sites.

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.cc/pify?keyword=bronte+go+station+mini+schedule+pdf
    • http://files.nextgymnastics.com/uploads/1/3/1/3/131398108/xerad.pdf
    • http://files.delaneygreenwriter.com/uploads/1/3/1/3/131381772/9b9ee.pdf
    • http://files.khairart.net/uploads/1/3/1/4/131437669/8221491.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/bufan.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/88565466339.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/manual_lance_blade.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/foxunakisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/kilizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/vabugomevolalop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/omron_blood_pressure_monitor_manual_bp652.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/invertebrate_zoology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/3584627446.pdf
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/jumoror.pdf
    • https://cdn.shopify.com/s/files/1/0430/4463/4773/files/63850789720.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/45733822027.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/wipezojoridawodavi.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_off0000b0c6.bin
cba4e879e02d718828bf065dfc6b09b928492d2d64c8d15afe2b8402a07dd33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C6 5616 bytes
font_01_sfnt_off0000c3bd.bin
4eea7e0889d945ad38b6159595f9b78884b1b3fb88bb6c54d8f74bdeda091278		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BD 10916 bytes

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