Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdb83eaf66f68f3…

MALICIOUS

PDF

35.1 KB Created: 2020-08-01 21:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70c021af300aac24462f814db5b8fd44 SHA-1: bf06a76800dacdc3078da5864a3e5b8a6e4acae6 SHA-256: bbdb83eaf66f68f3c556b2856fbdbe42b317da366b21e09b760f070bc7a85ea6
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc', suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains the target URL and references to 'merzbacher quantum mechanics pdf', indicating a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links further supports the link farm characteristic.

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=merzbacher+quantum+mechanics+pdf
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://files.stjamespreschoolwoolton.com/uploads/1/3/2/6/132681670/weduwajapikadata.pdf
    • http://files.charmcityjunction.com/uploads/1/3/1/3/131398129/fenulomuto.pdf
    • http://files.bdtcentre.co.uk/uploads/1/3/1/6/131636814/318803.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/vegijijoxusanaremidamak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/vekufaxifovufotozonagex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/xejeri.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/monadub.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/lusagedemutad.pdf
    • https://cdn.shopify.com/s/files/1/0429/2159/0951/files/zemiwakiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/28763402079.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/pipolagavop.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/zenoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/98702895874.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_off00004aca.bin
419a5c89cd5294f84f2efa035a49af2235ccf02aa98d470afd373792ccbc9061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ACA 5684 bytes
font_01_sfnt_off00005e00.bin
7b8a94ff9aa106f3a0f53e81b139cf4756383d200a58f65346675d30bf05a321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E00 9816 bytes

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