Malicious PDF — malware analysis report

Static analysis result for SHA-256 be17a9b10464de0a…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 14:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7653e120bb0ef96c33535ef02781513c SHA-1: 6b91db174110dd05c2c9a4bb833a47151eecf68b SHA-256: be17a9b10464de0a0dc1ce19aaf39e98324e6f4517c06bf07720b811a54b8ca6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating that it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links to external PDFs, likely to obscure the malicious redirector. The document body text, though partially corrupted, contains the string "https://ttraff.com/pify?keyword=two+letter+english+words+pdf", which is also identified as a malicious redirector. The primary attack pattern involves social engineering through a seemingly innocuous document that hosts a link farm, with the ultimate goal of redirecting users to malicious content.

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.com/pify?keyword=two+letter+english+words+pdf
    • http://files.fr.thesparkcontest.org/uploads/1/3/1/6/131636956/bifotujedogifokog.pdf
    • http://files.brokenwittrebels.com/uploads/1/3/0/9/130969621/gitujusadubitokaxet.pdf
    • http://files.revolutionsigning.com/uploads/1/3/1/0/131070842/3828423.pdf
    • https://cdn.shopify.com/s/files/1/0436/0794/9475/files/brts_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/an_anthropologist_on_mars_seven_paradoxical_tales.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/gezovonigukegojipimisiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/47253269992.pdf
    • https://cdn.shopify.com/s/files/1/0440/9357/1224/files/car_builder_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/mbbs_1st_year_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6201/files/xv2_mod_installer.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/36915638554.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/compress_file_size_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/83545204788.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_off0000663c.bin
774d455deb0164b617379315fd0bd169a9ca0addee86b40aec837820858fb8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 5132 bytes
font_01_sfnt_off000077c1.bin
f32eb5c62a0b0090e90b106d09dd049c31e3c6ae79b240752c647ec5f8a62d39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C1 13196 bytes

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