Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a39c0178f89f35…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 07:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e14b6936e8a0f2aaa6946311feadcad SHA-1: c2b47d6a0698505131eeec2d8ab3a18aae8e0ef8 SHA-256: d6a39c0178f89f35db00d3ecf260b3704167abf798338ecd0a365edd2299aca1
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, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to mask the malicious redirector.

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=ernest+hemingway+a+farewell+to+arms
    • https://static.usrfiles.com/ugd/b8c837_d81d96009fc34348a52a7f4357d28a81.pdf
    • https://static.usrfiles.com/ugd/b8c837_18e8494cf40943e0be9e1329dd4ba16d.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf0379e7f31b422aa60769b3024e833a.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc102151c145408da4fd1d363b2187d9.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9099/files/vopizipejugeponubodovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/pradhan_mantri_awas_yojana_list_2020_west_bengal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/warframe_silver_grove_specter.pdf
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/calculator_application_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/trumpet_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/anglican_sesotho_hymn_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/lufekutini.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/katapifose.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/66191770857.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8102/files/geribeke.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_off00007581.bin
baa9b7f96196472ac7d9f6d05019efbc48eb9c7fbe6bbe5c9b266971fb70453b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7581 5332 bytes
font_01_sfnt_off0000878a.bin
a3707f39795be46045e2677d99262b36ed0fb86a28f9927b29e5ad0069fb7980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 9992 bytes

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