Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b40d4a9fd762257…

MALICIOUS

PDF

42.2 KB Created: 2020-09-07 05:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df56fb5f7d381b5effb716b52d6c97c SHA-1: 4b74b44132c5c923f6e2acb6313a747767082488 SHA-256: 4b40d4a9fd762257ba21710baf77ceccd8abe689aa4469d3c562eb169105f30d
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 'https://ttraff.club/wix?keyword=clarinet+instrumental+music+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0431/1053/1238/files/warfarin_guidelines_uk.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting an attempt to disguise malicious activity under a seemingly innocuous topic.

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.club/wix?keyword=clarinet+instrumental+music+free
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/warfarin_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/sanezuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/swagger_api_documentation_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/order_of_man_battle_planner.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/35434142156.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/wizalunufowabazuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/1190288240.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/9249906766.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/jasper_reports_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/final_cut_pro_intro_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/fosowipuxeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/vubexonuloxazajosetetix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/tejegojirorawebanunoju.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_off000067e9.bin
f261788ed6daeb9321ce0add02b731032deadfc1e18ce63fc6fb3af05620cc8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E9 4932 bytes
font_01_sfnt_off00007895.bin
ce6494bd379dea72658a19a6de559ccdbd7655a09a1cbca17391604d1725226c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7895 10420 bytes

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