Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd03f507c3d3946…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 02:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8522c69fa6658444b0a83bef2407646a SHA-1: 3774226bf71a30dbbc4fdce6c10327867475e5c0 SHA-256: cfd03f507c3d3946e5ffe3598fc35ce94fe0145ddddf0336bac6077fdd246161
128 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'monthly expenses excel spreadsheet template' and embeds a link that redirects to known malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the 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.ru/pify?keyword=monthly+expenses+excel+spreadsheet+template
    • http://files.allstaraussies.org/uploads/1/3/2/6/132695629/rexizusewode.pdf
    • http://files.rykersonforkittery.org/uploads/1/3/0/7/130739742/fokapofeje.pdf
    • http://files.samlyonmusic.com/uploads/1/3/1/4/131407965/mewufuzubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/11382624157.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/assata_shakur_biography.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/rijupojozux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/sokixafodojobozomibaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/daratet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/19406724412.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/delegation_in_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/87950799975.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/60468579064.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/pepidar.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_off000065f7.bin
bc24ce396bd29293e26ecc007a3f2b348ff65c221a4fdd6b04c38c62f5c34554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 5488 bytes
font_01_sfnt_off00007880.bin
bee82988d9c07a064ca6b3086b507fe944d23626a5cde7b48769b0dd38f68806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7880 10148 bytes

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