Malicious PDF — malware analysis report

Static analysis result for SHA-256 7454a1f0948186d3…

MALICIOUS

PDF

47.9 KB Created: 2020-08-05 07:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c70a3fd67f25f2c74f1148d08c7b485 SHA-1: d498c69b1da275ae01d95c1432d3c954d4c1f4d5 SHA-256: 7454a1f0948186d390c0e03774f908357fa5ec54ef253dacfd4b75163f11e48b
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm designed to obscure the ultimate destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=c%25C3%25A1ch+chuy%25E1%25BB%2583n+file+pdf+th%25C3%25A0nh+h%25C3%25ACnh+%25E1%25BA%25A3nh
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdf
    • http://files.suttas.com/uploads/1/3/0/9/130969565/9463821.pdf
    • http://files.magriverwhitecottage.com/uploads/1/3/1/4/131411199/6335617.pdf
    • http://files.chikuniradiozm.org/uploads/1/3/0/7/130739991/gixinetuwuk-beruwidopax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/getuvijolorijafeguvuzirop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/tejeluwotexuwegokabadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/matoguwokivetavidebavux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/lasofamijaruf.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/86135339484.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/46625004681.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/weruz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/77436556976.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/catalogo_baterias_bosch.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/77820033977.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/76184932547.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/5391459285.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006361.bin
afa2fda44b003e3cbe95cf2af7a53b3451f2e4a3da82c7c09c8527a13cedf26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 5760 bytes
font_01_sfnt_off0000758e.bin
2193810714c814c901bf0979360eba7e8046dc0b91ab087b7a06d41d5d6d68cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 11292 bytes
font_02_sfnt_off00009a75.bin
f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A75 16376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.