Malicious PDF — malware analysis report

Static analysis result for SHA-256 851623afe9af2582…

MALICIOUS

PDF

39.2 KB Created: 2020-08-09 11:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb7510bdefaf7ccf2ceabf3c43f3fd5 SHA-1: 1be65f438e8f2c47bfc4fd469ed8b55f10c4bbc2 SHA-256: 851623afe9af258257791f7b8fb1139c8e4a1e910cbfcb4558377dccb78a9774
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on Shopify domains, likely for SEO manipulation or to obscure the final malicious destination. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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.cc/pify?keyword=amplifiers+comparators+multipliers+filters+and+oscillators+pdf
    • http://wifop.patriothallsc.org/uploads/1/3/2/7/132740405/4244205.pdf
    • http://files.nwutwincities.org/uploads/1/3/1/6/131606819/b5c5901a9575.pdf
    • http://files.southwestpaddlecompany.com/uploads/1/3/1/1/131163516/340899.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/fajobemiwesol.pdf
    • https://cdn.shopify.com/s/files/1/0454/9004/5080/files/merge_sort_algorithm_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/bad_company_feel_like_making_love.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/bahria_town_karachi_balloting_results_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/rewepupibosorebefewuziwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/52373950126.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/fusionner_des_documents_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/34055314450.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/13598602036.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.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_off00005257.bin
72a306f291f6108892760eff02416098802b8d679ddb837ca90f8db2ee14c9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5257 5288 bytes
font_01_sfnt_off0000643f.bin
4874cb9d4fa5946e1e9cac2c41b0618ed962424d7a604455e46503c2b83f3e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 14008 bytes

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