Malicious PDF — malware analysis report

Static analysis result for SHA-256 45044a3c07056401…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 16:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a546ca654aa1fb6334d3c3f868bacad5 SHA-1: 91aa77bdf432051e6caae643f95426610445c363 SHA-256: 45044a3c070564012457acbc5f2d25b50350dd93042e3ae6486dbbb4d048e91e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=bug%2527+s+life+game+free'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=bug%2527+s+life+game+free
    • https://static.usrfiles.com/ugd/3fb742_db262a6db0ea48d0b93383a258a99ed4.pdf
    • https://static.usrfiles.com/ugd/b8c837_84d57bfd287a4c5ab69d3ef4287faab9.pdf
    • https://static.usrfiles.com/ugd/868401_8e20bcf310934a189c10d47ceacc7d50.pdf
    • https://static.usrfiles.com/ugd/cdb50c_65890c388808473bbbc54ba7a07c9bb7.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/83105196706.pdf
    • https://static.usrfiles.com/ugd/f515ca_68d4eb96c48f4ff0bcc641a616804220.pdf
    • https://static.usrfiles.com/ugd/34e21e_7d17c9e473d849fc8ce6a076b93c2fc1.pdf
    • https://static.usrfiles.com/ugd/451a43_9b524e3f68a646d198e4cc22327085ba.pdf
    • https://static.usrfiles.com/ugd/89363e_de3dc09bf6274f4195bf232476aab542.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/36971587535.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/paporixofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/kefurobofode.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/9675102798.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_off000062b9.bin
6c1a83dc85a08744510706543551326c86154dab0e054e35d7b9cafa392494ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 5172 bytes
font_01_sfnt_off0000744a.bin
a762bf5eebb495720115084b2ffa0d67a7e2d0469ce09f8a6b9a61ec094ab505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 10260 bytes

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