Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e22027f9f2d501e…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 14:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06fc1d32db75c9b1d4fd70b235f915ab SHA-1: cdda8078dd2f32b711d3519a6a4494d55e3b4191 SHA-256: 7e22027f9f2d501e272a2870565ae974876c6631f5b27df199a78d7abc73f3ff
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely for SEO poisoning or to distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent.

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.ru/wix?keyword=caliban+in+the+tempest+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/4984/3868/files/lc_tri_sheet_nhc.pdf
    • https://cdn.shopify.com/s/files/1/0440/3996/2774/files/91909604467.pdf
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/maryland_magisterial_docket_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/tisereliforaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdf
    • https://static.usrfiles.com/ugd/edb4a7_205afab4e07e4dee9a04e887fee3eb36.pdf
    • https://static.usrfiles.com/ugd/e1d12c_121a8fb56cf144508547ebf5d818c1cb.pdf
    • https://static.usrfiles.com/ugd/067ecb_f75df51ac88a4f6fad51d97048ee3fb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f64b48ba92745fcb58da6a16f35c53d.pdf
    • https://static.usrfiles.com/ugd/87a178_6bd62e6c80c84b3c83fb472ee82c622e.pdf
    • https://static.usrfiles.com/ugd/23e9be_bd53a23b42ce41bb9a8c1657e0769ab2.pdf
    • https://static.usrfiles.com/ugd/cafc24_121375734dd34e89b9a5440112dfc80e.pdf
    • https://static.usrfiles.com/ugd/0d089b_d2de9801ebbe4087bdb961421f916347.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e52e76c26a4a27a458c873ae60bbbf.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_off00006fd7.bin
c4a35f5b9ed004272b85ff9204450c6910f9175cb90c6e40b3f764f05b7ee4f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 5232 bytes
font_01_sfnt_off00008173.bin
8a3b88709f899f8d26e024798e2a97aca8de3c710fd4432694b8cb0482656540
pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 10492 bytes