Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dff54d42bb2c92b…

MALICIOUS

PDF

45.4 KB Created: 2020-08-02 05:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ace574697cea9b05e09b721a6533fb83 SHA-1: d012103b25117d6bfde05a5ca3e4e4fb888eb277 SHA-256: 3dff54d42bb2c92b7f6a7908ad4b6a0562acad942cc09e40a6279ec24f39fc99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Link

The PDF contains a malicious redirector link disguised as a necessary download or update for viewing content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=window+8.+1+build+9600', which is flagged as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, including one hosted on Shopify. The heuristic 'SE_BROWSER_INSTALL_LURE' further supports the social engineering aspect of this document.

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=window+8.+1+build+9600
    • http://files.adairsvillechristianchurch.org/uploads/1/3/0/7/130776887/1954720.pdf
    • http://files.northlandwild.com/uploads/1/3/2/6/132681337/9227028.pdf
    • http://files.cityinfluencers.org/uploads/1/3/1/0/131070207/vetipupimaxox_kumugijipix_timopol_luzinegitodanod.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/37164061430.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/kujalarizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/zaruxosije.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/kixidegeris.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/65181907774.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/47657046032.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/20478388959.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/90547609085.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/3041092182.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_off000073b5.bin
f3152a6de1b6137efe6488b7a72154ef125c16c13bd5425b51bde9efc62136b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B5 5312 bytes
font_01_sfnt_off000085fd.bin
61d7333ed7bf2495018046ff4b5ea6fdb146d7a72fb277a7667fae6e7423ff7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 10360 bytes

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