Malicious PDF — malware analysis report

Static analysis result for SHA-256 97792c94be90ef8d…

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 01:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b426f9168916602456fbb98bfd9500f SHA-1: ad0f8d3e011415b8ac91d3f129f22206c28c8435 SHA-256: 97792c94be90ef8d913c5ac8f153fdec78c8e90ddd2dd092399b75be53a5dd7f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate that this PDF is part of a link farm, likely designed to manipulate search engine results or redirect users to malicious sites. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=durga+amritwani+song
    • https://static.usrfiles.com/ugd/b8c837_79db1b3cedb34562867ac8531568f8aa.pdf
    • https://static.usrfiles.com/ugd/74e905_5c06ecb9b8d14dca94765bfa5272c737.pdf
    • https://static.usrfiles.com/ugd/d5d855_7fc5e47b0af240a697e27a2e65e72ebf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/10621723999.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/wakax.pdf
    • https://cdn.shopify.com/s/files/1/0461/7034/1528/files/xufovigotuzipev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/assignment_abroad_times_epaper_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/81722687841.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/wodaxari.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/95626480043.pdf
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/discrete_wavelet_transform_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/fluid_mechanics_hibbeler_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/aeroelasticity_of_plates_and_shells.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/welifam.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5213/files/changing_django_admin_templates.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_off00005b6d.bin
d0f215adcfd9b83e8d1113286345514db73885d6f30a02f87f1e73bc059915c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6D 5064 bytes
font_01_sfnt_off00006ca7.bin
90b91be67d16bae95d62c6a72fa8175b66bb3dbf47823790b6aeacca6be3610d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 9928 bytes

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