Malicious PDF — malware analysis report

Static analysis result for SHA-256 94414cbb1d20b5c6…

MALICIOUS

PDF

44.2 KB Created: 2020-08-09 07:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78e58344c0b347509bf0dcc4e12c23c2 SHA-1: b092e7f6c32fd1e1dd701472d24f6ae10188e8f8 SHA-256: 94414cbb1d20b5c605f8f66f3cd91f6bf6e95de6692941ce479766aebf727111
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=academic+writing+topics+pdf'. This URL is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, likely an attempt to improve search engine ranking for malicious content. The presence of obfuscated content and the nature of the redirector suggest a phishing or malware delivery attempt.

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=academic+writing+topics+pdf
    • http://files.taupobiblechurch.org.nz/uploads/1/3/0/8/130874097/8fe4cde900f4.pdf
    • http://fovuvu.winndems.org/uploads/1/3/1/3/131383483/ffb4648.pdf
    • http://files.vironit.us/uploads/1/3/1/4/131452938/wanidu_fimobem_tegitedufuv_baxuwed.pdf
    • https://cdn.shopify.com/s/files/1/0429/1480/7974/files/bidomaju.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/tratamiento_del_alcoholismo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/10883587415.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/capitalismo_comercial.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/tubojaxiguxir.pdf
    • https://cdn.shopify.com/s/files/1/0429/5547/3059/files/bubosuwuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0565/files/bojaxibusevo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/walden_henry_david_thoreau.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/circular_motion_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/27520126290.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/winevipomuweg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/dalolabiwepaza.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_off00006f20.bin
2b56e3c2d84448211a0d2ec70ab4fc53767dd0eafb0d4cad1e4d5a66799515aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F20 5524 bytes
font_01_sfnt_off000081e8.bin
e4336ab9cdd8eab52adf475f282c7152dde8ec2e69cef2df7ab2ab227da8a7fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E8 10024 bytes

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