Malicious PDF — malware analysis report

Static analysis result for SHA-256 668e7550b212d9e8…

MALICIOUS

PDF

39.5 KB Created: 2020-08-28 22:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df2fe1a5a1bc0030c28149ba179cd271 SHA-1: 10ea4ef73d98b869268849c87ecbd591bae056b5 SHA-256: 668e7550b212d9e869efc88884fcc2fccc14d9f11f57ab2c3e020e6eabc2f59a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for users to click these links. The presence of numerous links suggests an attempt to direct users to potentially malicious content or infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=you+should+be+here+kehlani+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_2fe25d6526324c378ceb3e72ea834f89.pdf
    • https://static.usrfiles.com/ugd/b8c837_64868b7e3afa4005ab0bfa9053173533.pdf
    • https://static.usrfiles.com/ugd/b8c837_fffc3add1a194ecb8ad92f23bd26b7d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_deb879493aa64324a0062f7b02f87ef8.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc77888b63c54c609c48469be275e08c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bc0202a14354e588fc094bff3d3c6d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3003a8fbfa364b62989e451aa61fb442.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a9305f6588b4474adc7c5e9845fe4ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_337eaea437404630ab88b982952dc62e.pdf
    • https://static.usrfiles.com/ugd/b8c837_729f1392a6704275a923f1451ad5518e.pdf
    • https://static.usrfiles.com/ugd/b8c837_22d89e09ffd047df98b25af2dc1b2302.pdf
    • https://static.usrfiles.com/ugd/b8c837_17a860dedf444e51891f04637412621d.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/89701594605.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/pizis.pdf
    • https://cdn.shopify.com/s/files/1/0440/8449/4488/files/63864633756.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/46918240716.pdf
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/converter_para_dwg_gratis_online.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050fb.bin
8c32a009dce2dbeca5e4732f482ff9fb4e339dd1c3246a79f6d5f60dbf073317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50FB 5064 bytes
font_01_sfnt_off00006217.bin
45e2d50087bbb23149a0427d55553eedd2fb11d2ca85a687104491718cb72683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 9660 bytes
font_02_sfnt_off00008338.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8338 4324 bytes

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