Malicious PDF — malware analysis report

Static analysis result for SHA-256 30924f9e20a2c85b…

MALICIOUS

PDF

60.6 KB Created: 2020-08-30 10:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c189139510b87c9613c0c6ed77ee79f0 SHA-1: a5ab130c4b03b0e7b20f953283202154ba492223 SHA-256: 30924f9e20a2c85b8147ddd1ad00ea62070af550a2fe0ff85b6146d892d47242
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic identifying a redirector link pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL which is likely used to redirect users to a malicious site. The presence of multiple embedded PDF links, even if some resolve to benign content, suggests a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=resumo+detalhado+do+livro+cana%25C3%25A3
    • https://static.us
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/xulenufafeza.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/1976_lincoln_town_car.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/types_of_chemical_reactions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/alchemist_5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_93101a807d464f42903c65c8a4de4a78.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a23793e39214501a84623e8fb0e75d6.pdf
    • https://static.usrfiles.com/ugd/97634b_a598324e223249f6bb50feb4ae576df3.pdf
    • https://static.usrfiles.com/ugd/0f5b72_2a062199006e4649a4ad2130692db63b.pdf
    • https://static.usrfiles.com/ugd/b8c837_471ef8e33f964ebba8d3aa96f8b02e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_763926e47f9a4b1cb8e39b398d1d41ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_013be2fdc21c4e9b97afb638a87075e5.pdf
    • https://cdn.shopify.com/s/files/1/0433/2411/3049/files/free_inductive_bible_study_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/8613453006.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/24426353605.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/32774578731.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000801e.bin
03aab89b70bed8600b92c6b86c90e4f5f4c779c5237713bd6f620afaea9ffbdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 5444 bytes
font_01_sfnt_off000091e8.bin
e9fb9447b67ab83e15728689f50864f40d3136dd1585db2f84dbe6661a883b9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E8 12472 bytes
font_02_sfnt_off0000b7c2.bin
ed2afd1c1dd60b985fd4900858e582774f7b26c742d167afd4dfd160a47eeed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C2 18620 bytes
font_03_sfnt_off0000d49d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD49D 4324 bytes

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