Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5e4fc6705cec42…

MALICIOUS

PDF

45.2 KB Created: 2020-08-26 03:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7287ddba31648fc42845f3dd25e4c2e5 SHA-1: 7e73e8d2518fc92efbad7c93cdb822e99248ac7d SHA-256: ed5e4fc6705cec4265276b7fab8a0249ac6269ab90958f166e33ce4fce4e8b2f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=lenovo+flex+5+vs+flex+4', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain references to this URL, suggesting a lure to external content. The presence of a link farm indicates an attempt to distribute malicious content or conduct phishing operations.

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.ru/pify?keyword=lenovo+flex+5+vs+flex+4
    • http://files.sarasotacountysurplusproperties.com/uploads/1/3/0/7/130739263/pisesawaxupi_furaziguve.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2813/files/31535507022.pdf
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/fazopeba.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3510/files/bill_of_lading_formato.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/vebeveke.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/new_jersey_driver_manual_test.pdf
    • https://cdn.shopify.com/s/files/1/0457/0772/2908/files/informal_assessment_tools_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/22462910515.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/bmp_to_converter_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/xupaxaxisobuvolosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3336/1574/files/panuguwuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/54509306552.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/22121841624.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_off0000733c.bin
f81696044d2d259fd7a689252ce9b88cfca1fef2a0cf7e730dd18150b25364d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 4736 bytes
font_01_sfnt_off0000838d.bin
f7577b4e4b0abd87429b8bff13d13ce44fc7f9ab93b3debcd8e5caab73b7494c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 10760 bytes

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