Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2a27ec0da7d12d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-04 20:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff61bfa702c8d1ecd4ef35af754810e SHA-1: 4208cc117b46b0cdb44d36b315a1965a24a56bbe SHA-256: 4d2a27ec0da7d12d26504c42f942a00a8900c6a0714f9aa011d9c06cadfe2910
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body, though corrupted, contains text suggesting a lure to install a viewer or update, which is a common tactic for malware delivery. The primary malicious URL identified is https://ttraff.cc/pify?keyword=font+weight+bold+not+working+in+pdf, which redirects to other PDF files hosted on various domains.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=font+weight+bold+not+working+in+pdf
    • http://files.halfpintaussies.com/uploads/1/3/0/7/130739131/f9eb0b7c6cd6b.pdf
    • http://files.ahespta.org/uploads/1/3/0/8/130813427/9969547.pdf
    • http://files.myswimvillage.com/uploads/1/3/1/1/131164205/8091349.pdf
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/ms_comfort_optical_mouse_3000.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/vermilion_parish_jail_inmates.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/xagezikofokoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/78422375507.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/pilowiduzujedofuxazude.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/modozevezijegixixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/54020249455.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/39701413385.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/lowes_rapid_city_sd.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/79017914337.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_off00005ae1.bin
0e44bfdd9f18db15686c6117c903b3e453274d0f59acbea9c0c307806c2abae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE1 5168 bytes
font_01_sfnt_off00006c82.bin
edb19fd90830e7515dbbccbc51d1cef5190e5cf0d659632ce814ce810fa721af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C82 14164 bytes

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