Malicious PDF — malware analysis report

Static analysis result for SHA-256 78945680e80a9361…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 01:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb07d84c14d63bba6d56699cd817da60 SHA-1: b2fef06e76df36c281dd64a75398661cd99e7658 SHA-256: 78945680e80a93613feddf7c4323836436f09e390f857b5f63534bda0ca7fa72
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is associated with known malicious activity. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a coordinated effort to drive traffic to potentially harmful sites.

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/pify?keyword=json+form+builder+python
    • http://github.com/wq/html-json-fo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_822f31ee723b42e396225a7d915ab1c8.pdf
    • https://static.usrfiles.com/ugd/d216cb_391e3fd290904347ad1f809039b55232.pdf
    • https://static.usrfiles.com/ugd/e5412a_3ab3c342f09644a8b46ff8dde86a4218.pdf
    • https://static.usrfiles.com/ugd/b8c837_928a94b2058d404e9d6d79e4460ce33f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8dad06ab114994a11c46421c81dde1.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/arnold_schwarzenegger_soundboard.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/demila.pdf
    • https://cdn.shopify.com/s/files/1/0439/6092/6366/files/83597806946.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/gagukefenefomupof.pdf
    • https://static.usrfiles.com/ugd/c068f8_6adba200718649ddb39aa2fae758c25d.pdf
    • https://static.usrfiles.com/ugd/1be480_33adb5adcce942668cae0c7f4411f06e.pdf
    • https://static.usrfiles.com/ugd/97493d_1f989ed7655e453d99baefd542f32d42.pdf
    • https://static.usrfiles.com/ugd/b11f6d_8ab97ad8e42349eda53c559f19b171e5.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006426.bin
98b7a46eee48599fbe9f3c6a6c806a40fc8e7e59241481b9ca9d37e1bfd326c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 5304 bytes
font_01_sfnt_off00007605.bin
7f7729af9444fc4b5ded4e20c548b2ace98645f71c2d0366b927c75244738a28
pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 10700 bytes