Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ca232e461805ea…

MALICIOUS

PDF

34.2 KB Created: 2020-08-20 20:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a8060772d65aaf549ee902f86b85121 SHA-1: f12ee9037d1cc8d947a6cd5765cbb08538881e33 SHA-256: c2ca232e461805ea926a4673b61c3985845450ebab04e4d41c4778f71bee3b13
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=bwv+1004+barrueco+pdf, is likely intended to lead the user to a malicious site. The document body itself is heavily obfuscated but contains references to the malicious URL and other PDF files hosted on various domains, suggesting a link farm or redirection scheme.

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=bwv+1004+barrueco+pdf
    • http://files.sharqidance.com/uploads/1/3/1/1/131163492/f647529cbc98e4c.pdf
    • http://files.historyneedsyou.com/uploads/1/3/2/6/132681694/28e43da7e1.pdf
    • http://files.officeformations.com/uploads/1/3/2/8/132815787/3737cbdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/descargar_cancionero_de_guitarra_baladas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/68337160397.pdf
    • https://cdn.shopify.com/s/files/1/0437/0461/5066/files/pijasizoxulim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/jafagubetura.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/tubigowisaxedikoduvanob.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/84012138035.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a0.bin
1d422c307858f8a8fbdb4e1519bdb199d3086cd9c0b5f915c3cb3758f229a6a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A0 5564 bytes
font_01_sfnt_off00005aab.bin
dc9770698eae53ac0e9c500e4addcdf85433870c5a0047f09e8894c2246fa923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAB 9868 bytes

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