Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f910867f1aefb3…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 13:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae6533f8abcd2a601e47f12d3b23b15 SHA-1: 924e6e0f4e67240c80ee8331e3c31370b6b05ab7 SHA-256: d6f910867f1aefb333f8ed1c14a08082a2626c38c2997f591473101017b16d0a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, masquerading as a free resource for 'English grammar games'. This indicates a social engineering attempt to direct users to malicious infrastructure. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination.

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.cc/pify?keyword=english+grammar+games+free
    • http://dasota.pauladuartetango.com/uploads/1/3/1/6/131637814/fc787047c288.pdf
    • http://files.hannahfairchild.com/uploads/1/3/0/8/130814056/zunowefinubin-barenojajuve-fibetopiwegobu-tokibiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/81900753065.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/vazodobopuxala.pdf
    • https://cdn.shopify.com/s/files/1/0434/4689/4758/files/genetic_mutation_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/58388586589.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/livro_epidemiologia_grtis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9799/7991/files/kavuselaruvup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/variable_frequency_drive_project.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/vitirirari.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/xububasadafegoziwuwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/principles_of_electroanalytical_methods.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_off00005f3a.bin
c42a414dfc4e244d8bcfa81534ebda107f59c931a828211f345d92db8ad20d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 5140 bytes
font_01_sfnt_off00007089.bin
a8cbf70e96469a418d1b9c303ad5c06e23d3e788e4c995ac93ca9ada0e9e84cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7089 10116 bytes

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