Malicious PDF — malware analysis report

Static analysis result for SHA-256 3245134d8c862c8f…

MALICIOUS

PDF

39.0 KB Created: 2020-08-18 15:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 674416eed052dedc32386abaabe9363b SHA-1: 2aafe9e245bff332c8155a687a0bb8f5ef2c8268 SHA-256: 3245134d8c862c8ff0beb93c4656ab4bcc53974a2a54b88e0445c26dccd25ffa
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links redirects to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a clear intent to redirect users to malicious infrastructure.

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.ru/pify?keyword=hundreds+tens+and+units+free+worksheets
    • http://files.hcwellnesscenterandspa.com/uploads/1/3/0/7/130739081/rukatofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/26090524748.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/veturelazafoguxatizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/ganpati_atharvashirsha_gujarati_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/cool_powerpoint_templates_for_business.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/free_website_templates_for_web_hosting_company.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/mac_addresses_manufacturer.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/call_blacklist_apk_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/dofebonoligato.pdf
    • https://cdn.shopify.com/s/files/1/0444/3540/7014/files/nikon_d5200_manual.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_off00005b72.bin
263be91399c65594e8711c6d20b6edcaf8661ce4dd3331ba28583f8fb9a6a4c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B72 5080 bytes
font_01_sfnt_off00006cbf.bin
daeb44ed7d9d78e75d1cefb7641e93b5992d1a2902f5a91b54317f641b43f27b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 10204 bytes

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