Malicious PDF — malware analysis report

Static analysis result for SHA-256 232139b5e9b46d14…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 11:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94d7e6d943ffc5d0a4db59ed447377c0 SHA-1: 1cbd292034b0f1d63ffaa6bcbe67f9a5a9d15e02 SHA-256: 232139b5e9b46d14b11e50ba9a177476a30e0fd988838d31c94d3de070acd525
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, directing users to a URL that appears to be part of a SEO link farm. The document body, though heavily obfuscated, contains the same malicious URL and several other URLs hosted on Shopify and other domains, some of which are marked as unknown. The primary malicious URL is `https://ttraff.cc/pify?keyword=bed+bath+beyond+full+xl+sheet+set`, which is likely intended to redirect users to a phishing or malware distribution site.

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=bed+bath+beyond+full+xl+sheet+set
    • http://ravivu.plainfieldspanish.com/uploads/1/3/1/4/131453574/zitife.pdf
    • http://wofutin.missioneventrentals.com/uploads/1/3/1/4/131453858/587dd175697a41a.pdf
    • http://files.thesolbus.com/uploads/1/3/1/1/131164100/18169ed1ac74dd0.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/makkar_ielts_speaking_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/lathe_cutting_tool_angles.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/donald_barthelme_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/wejiparitoge.pdf
    • https://cdn.shopify.com/s/files/1/0446/8817/9353/files/building_design_and_drawing_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/88371530565.pdf
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/97214888594.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_off0000600b.bin
02903e166dc48058ff5aa8203f8a437b02d3871caf67c774f9874081fae4b35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 5256 bytes
font_01_sfnt_off000071f6.bin
d15e083d81900318d1efe9ef63c94bda835c1721fbf1e3ffd81179f5319a2d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F6 10044 bytes

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