Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b90d1ff88bcaa1…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 14:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e05980c280c0a326c715e49b814182f SHA-1: 01175fb6d581cb072f95f246a3c9057b646a5306 SHA-256: 66b90d1ff88bcaa18308d2d931b38a1ec6fb6fdc4b6b8e7c55963235e92f315d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links to external PDF files, suggesting a link farm or phishing lure. The primary malicious URL, https://ttraff.cc/wix?keyword=descargar+cronicas+de+una+muerte+anunciada+pdf, is identified as a redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to drive users to malicious content, likely for further exploitation or credential harvesting.

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=descargar+cronicas+de+una+muerte+anunciada+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/87577025048.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0441/3410/5240/files/25329144333.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/mamalorev.pdf
    • https://cdn.shopify.com/s/files/1/0439/0472/9243/files/bamopuwemeza.pdf
    • https://static.usrfiles.com/ugd/57c819_4bb68b366572402dadea049e4a2abf4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1522739be774e70bf829b1d004e010b.pdf
    • https://static.usrfiles.com/ugd/b8c837_01691dad6cbc42808a6100412fca9911.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed579ad385854d5c88d434ac03084648.pdf
    • https://static.usrfiles.com/ugd/9904c2_7f3019bbc2074263bb5e779231a50401.pdf
    • https://static.usrfiles.com/ugd/b8c837_f99bd3d67a4b4b1f82edcba6edde4e40.pdf
    • https://static.usrfiles.com/ugd/b8c837_a55c3657c1c346ceb08a8fe36e0100b7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/rujosefovokefilef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.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_off000064a6.bin
19e67163a75604560e5feb90ec940e05e7848497045db8bde172930aa4ad3bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A6 5440 bytes
font_01_sfnt_off00007711.bin
46669e8381ebb4d7cfefd1aae351ed8c7db8bf0041f3ef97428887e6f8f93353
pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 10960 bytes