Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a7344de03098a6…

MALICIOUS

PDF

46.2 KB Created: 2020-08-12 09:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bed40bd51583ee41b4ef161c46d82f7 SHA-1: 06c7e014775fd869ad544715e03f6b791f00b028 SHA-256: e6a7344de03098a68720303ac9928fce056eff6267c7c28302fcd86eab6023fd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=biochemistry+for+medical+students+pdf+download'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading further content. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely for SEO manipulation or to host additional malicious files.

Heuristics 3

  • 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.
  • 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=biochemistry+for+medical+students+pdf+download
    • http://files.jamesekdahl.com/uploads/1/3/0/8/130813988/4746929.pdf
    • http://files.pnagkc.org/uploads/1/3/0/9/130969343/34ec6003ed3089a.pdf
    • http://files.timmesserconstruction.com/uploads/1/3/1/1/131163666/1984394.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/2867517755.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/different_types_of_nanomaterials.pdf
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/mumoperizug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/jinudakipovopebipe.pdf
    • https://cdn.shopify.com/s/files/1/0447/2451/9066/files/media_company_profile_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/cat_faces_emoticons.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/72143936877.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/58650429322.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8938/files/70312043280.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/fubak.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_off00007584.bin
7b1bc062fef840e814fa34d85db4f9b05664939a73483b90466db7d08d8a8033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 5640 bytes
font_01_sfnt_off00008898.bin
a2c0e453f55e7c8f83b6eaa3545f8b880045c0ab79ef426a5cd473361e6ded33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8898 10252 bytes

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