Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96bb58e744313bc…

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 07:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b70935639512d66023130c636eac4f0 SHA-1: 9e175c5a5da700debdc2a707b77bb5324dec0c00 SHA-256: c96bb58e744313bc7a8b3d8add41bd7df71c34ba360caa95c7cedae45bb3155e
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector infrastructure. The primary malicious link identified is https://ttraff.ru/wix?keyword=op+amp+formal+lab+report, which is likely used to direct the user to a malicious site. The document body, though heavily obfuscated, contains references to a lab report, suggesting a social engineering lure.

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/wix?keyword=op+amp+formal+lab+report
    • https://static.usrfiles.com/ugd/ea5d7b_5743a5cba9f24bfa90029c3d058b580d.pdf
    • https://static.usrfiles.com/ugd/12f4eb_df990153956c4eeab05dfbda7957ee0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_da4fe64f67e24aea8e24ee33a2711ec5.pdf
    • https://static.usrfiles.com/ugd/ef7b09_e18f4fd435bc4075b2bdd0f734c35ed3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/59417356165.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/99442383085.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/50463366800.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4527/files/52905050213.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/vutuzisajukudi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/insert_new_worksheet_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0439/4365/7627/files/granada_albeniz_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0463/3391/9393/files/building_information_modeling_journal.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/67211918376.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/subnautica_base_building_tips.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_off0000654e.bin
ed79fead8644104dd877466fc3330129a7a8ec1317c2468c1f6689f2dccd9beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 5036 bytes
font_01_sfnt_off00007654.bin
80993b2e3c242e71a96fe3a82ee38b62f997aa908d47b132b991612e331f9cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 10436 bytes

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