Malicious PDF — malware analysis report

Static analysis result for SHA-256 5833a6460de071ed…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 14:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59dc3d7ac3ae5ae3ba267aa5fa448faa SHA-1: f2261f9523a70390b3857d7f2d0684cdb3c60cac SHA-256: 5833a6460de071ed6706ddaa45a4a2ca884e49a25078552f89057d1df0c82980
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, https://ttraff.com/wix?keyword=best+free+plugins+for+davinci+resolv, is flagged as a known malicious redirector. The file also contains a mass external PDF link farm, with many links pointing to static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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.com/wix?keyword=best+free+plugins+for+davinci+resolv
    • https://static.usrfiles.com/ugd/b8c837_e41261e3f39d47ac8a0695c7094588b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_94d27aa776bf44f5a4c7e6f533809d00.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c21f3a9479542fc966c7fa7896050f6.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/dagirovene.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/3707115437.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/rizolazonapexalikan.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/92942510565.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/developing_the_public_relations_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/fortification_of_milk.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1578dece73340fc9d5ec14cd4dca690.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a820ffac58e45f9ad55be805a49107a.pdf
    • https://static.usrfiles.com/ugd/b98abb_72cd5335c9b545b1a8df691538be0e6d.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_off0000605f.bin
1c58d4f52da177906b301aac4f746814675f3d1f9fb2f547b9238fbca2f57ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 5432 bytes
font_01_sfnt_off000072f0.bin
8e875d5af593a958d5fe6e00b0c8e6040dc3d777db66d69d24de03d01fd69a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 10532 bytes

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