Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af0ccd483ead4db…

MALICIOUS

PDF

36.9 KB Created: 2020-08-02 00:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afbcd27700d5f2ccbd7c4a4ccb11f8a SHA-1: 82a630ddc1d9412cf0254c6172455e77e70b1b5a SHA-256: 3af0ccd483ead4dbf576a05f52c825c48e8a513a65ed781ea42e495650ab2cc9
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body contains text that appears to be a report card, likely a lure to encourage clicks. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector.

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=ksde+report+card
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdf
    • http://files.foodbuddha.ca/uploads/1/3/0/8/130873781/3554481.pdf
    • http://files.totallynordic.co.uk/uploads/1/3/1/4/131408970/dizagugiripimuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2751/0934/files/36136277495.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/65900795276.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/77244398567.pdf
    • https://cdn.shopify.com/s/files/1/0428/2803/8310/files/kixujiratozitiluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/tovotogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/zododupomerosesunuvugona.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/fenekokinedenugejak.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/mekelunuweridava.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/mowerabitinogaxadufigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/51820961827.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_off00005199.bin
fb9cd9bc4b81387791c433702a6cf756fdbcafcf47f9df4c882fcd6ecc1a230f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5199 5004 bytes
font_01_sfnt_off000062ab.bin
9d57a7713066f208c9a90d4db2cfc9e2d66a36126ad2544b5b1ca13fc79f0755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 10672 bytes

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