Malicious PDF — malware analysis report

Static analysis result for SHA-256 67eaec7029faa428…

MALICIOUS

PDF

33.7 KB Created: 2020-09-01 01:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 851ef85cb2d001e0a530eb8fef307bda SHA-1: a2a9f700799c96dfdc0242efd65af91598f003a5 SHA-256: 67eaec7029faa42836e26bae4546f95a577772885909f081f06a846820e7ff7a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is characteristic of a link farm or SEO spam campaign. One of the primary links, 'https://ttraff.com/wix?keyword=intrapartum+care+rcog+guidelines', is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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=intrapartum+care+rcog+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/wagobowusujaxifaxizuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7805/files/manem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/wizerufekibigavakuxufukuf.pdf
    • https://static.usrfiles.com/ugd/5926b4_472ce4421343451cac67b7e96cf54696.pdf
    • https://static.usrfiles.com/ugd/b8c837_88574f32a474429e86cb0524108e9c2d.pdf
    • https://static.usrfiles.com/ugd/9ea91e_b6f7200432ef4493a09e4865601317ec.pdf
    • https://static.usrfiles.com/ugd/55f640_2484645db4654208936bafbf24abbfd4.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/rexosejevo.pdf
    • https://cdn.shopify.com/s/files/1/0443/0875/8684/files/kolefokatuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/jovaverenofikarab.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/elements_of_photogrammetry_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5575/files/63180892423.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/boston_celtics_news_bleacher_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.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_off00004754.bin
b858bb3db2b599021fb1a07dd1a4cd78966f25d11c914343638ad7a78d453fed
pdf-font-stream PDF embedded font (sfnt) at offset 0x4754 5328 bytes
font_01_sfnt_off0000595a.bin
3396acac5b873a21f667d0704e784e83030a8d5fb3c88c02fd7c3877b01e4260
pdf-font-stream PDF embedded font (sfnt) at offset 0x595A 9636 bytes