Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ae6d1f66201573…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 22:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae42e992a128a1b1b972d43b8840d7b SHA-1: 98e8284e0f243394f457e6ed6ac1833927ff603d SHA-256: 92ae6d1f66201573a9751bc101a9f6e2b53d3c202a52188913a392a5d8c9db62
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=carnatic+music+basic+lessons+in+tamil+pdf, which is likely used to redirect users to further malicious content. The document body and embedded links suggest a lure to download a PDF, which then leads to the malicious redirector.

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=carnatic+music+basic+lessons+in+tamil+pdf
    • http://files.nworldweiqi.com/uploads/1/3/1/4/131453431/4578662.pdf
    • http://files.aosfb.com/uploads/1/3/1/4/131454373/firabaxoguweduv_lizot.pdf
    • http://files.anaicostarica.org/uploads/1/3/2/6/132683003/2909852.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/10437927267.pdf
    • https://cdn.shopify.com/s/files/1/0440/2793/6918/files/optiplex_790_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/kifumix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/18547643181.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9991/files/vewikezisodu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/dopovabafodemusufotu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0460/4066/files/wildgame_innovations_trail_camera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/77185733954.pdf
    • https://cdn.shopify.com/s/files/1/0434/1635/4978/files/2017_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/53598406384.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/filoxenisewegukagodip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/mitawolegejeza.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_off0000681f.bin
f929575bb9173237d42db908bb41e7fbec9039cda59cddd2b9b7bdab15d5638a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681F 5344 bytes
font_01_sfnt_off00007a28.bin
0eb30de879cd24984fadb793bf7ec7af468046cdafc634d4a71ebc99fd5d6e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 9820 bytes

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