Malicious PDF — malware analysis report

Static analysis result for SHA-256 6084a19e53162010…

MALICIOUS

PDF

37.3 KB Created: 2020-08-30 10:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe7f7fb0cd0376327123679049fe3b08 SHA-1: 9572c5d492e1ce38c0f34628e83f10eb8ac96fa1 SHA-256: 6084a19e53162010424cf31ed5339daf7919bb8367456a40cc0be08f94ed2818
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically `https://ttraff.cc/wix?keyword=skylight+paycard+bank`. The document body, though heavily obfuscated, contains text fragments related to 'Skylight paycard bank' and the PDF generation tool, suggesting a lure. The presence of numerous external PDF links, many pointing to `static.usrfiles.com`, indicates a link farm strategy, likely to obscure the malicious redirector or to host further malicious content.

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.cc/wix?keyword=skylight+paycard+bank
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6cf392_7902de75d6094bb49ed74c7f8f6f854d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a487ad2d96e4df2949d3a1a9a78f803.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2b371bcc72483caeeb6e56aeef2e0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_deb879493aa64324a0062f7b02f87ef8.pdf
    • https://static.usrfiles.com/ugd/4bb894_225a9d8a927646a5a508f701e6d749cb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/free_microsoft_outlook_forms_templates.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/pour_le_libralisme_communautaire.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/pojibusosegepogu.pdf
    • https://cdn.shopify.com/s/files/1/0457/6683/6388/files/80291441201.pdf
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/nigemojulagumejurupuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/dragon_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/adaptations_of_xerophytes.pdf
    • https://cdn.shopify.com/s/files/1/0464/6885/8024/files/79446174043.pdf
    • https://static.usrfiles.com/ugd/1f2646_9ac24fd5f9d3453fb904e8d7efae7515.pdf
    • https://static.usrfiles.com/ugd/9374a7_5d2e5954ef6a40fda1764ca1ba4cd7ea.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_off000050a4.bin
853c5bb12d6dceba3b07ac2191d69f80355a28216b33410e4803559117364d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A4 5564 bytes
font_01_sfnt_off00006385.bin
c2388e1faeb178cdc39ac25397a3c711f8e2ccbba5e4d366fe85c830174b11ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 10544 bytes

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