Malicious PDF — malware analysis report

Static analysis result for SHA-256 007dbfc14d13f9ca…

MALICIOUS

PDF

37.3 KB Created: 2020-08-29 14:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 670f479d173d1db443850df840ee203b SHA-1: ed49160ec3c54f5039af093a6cde749670952821 SHA-256: 007dbfc14d13f9cad43a2c595dcae8e07291be7728ae00132115fe773a943b09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL that appears to be a lure for downloading a game ROM. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user to a potentially harmful site.

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=zelda+majora%2527s+mask+rom+espa%25C3%25B1ol
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0f5b72_6a51d2a5455f41a0aca4ba8888dc5997.pdf
    • https://static.usrfiles.com/ugd/7598fa_c6357da0cb794b11af0c992838bee990.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1aa704ffc6643e59f8f72d585eeecec.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b35373980c94348a067614fc0972e78.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9241e52ab424c03988c79654fa4195f.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/xijoza.pdf
    • https://static.usrfiles.com/ugd/b8c837_adcbfd0dd84c46919f0b95b7516ae856.pdf
    • https://static.usrfiles.com/ugd/b8c837_24ede20650a348659a7f1e479947ac59.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae03b30485084813961b24a2ed935480.pdf
    • https://static.usrfiles.com/ugd/b8c837_57428347f6fc468890c7973cfa0577a9.pdf
    • https://static.usrfiles.com/ugd/105a8c_b74a0f4065d24aadb00cb5992b40c9ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b2bcb4b26be4650989713ea16f496c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcec6dcc8de243fc838afbec83118803.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_off0000501e.bin
633853ad9e93b5dee0e40431984815033431c144a9f15185105a5713cd139e32
pdf-font-stream PDF embedded font (sfnt) at offset 0x501E 5448 bytes
font_01_sfnt_off0000625e.bin
6c2ab44e1571a74b08c8782929d3ec318bb459036682fcb31c12f3b7363a5ab9
pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 10688 bytes