Malicious PDF — malware analysis report

Static analysis result for SHA-256 0392a653ad305915…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 10:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a8c44710566ecc60750f433bf21460 SHA-1: 4ff5107884f6d380f4b63d196afbb44f1138bf60 SHA-256: 0392a653ad305915ebbc01b2e810b99f3c2e0e7b08b66f4a12ec512bcd6413a3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though obfuscated, contains the URL https://ttraff.cc/pify?keyword=adventure+game+engine+pdf, suggesting a lure to a malicious site. No scripts were extracted, but the presence of malicious links is sufficient evidence of a phishing or redirection attack.

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/pify?keyword=adventure+game+engine+pdf
    • http://files.rituverma.net/uploads/1/3/1/4/131453170/tumasizafumij-wegitafezoxeduv-negabulat-kesiparenepit.pdf
    • http://files.jeninottphotography.com/uploads/1/3/0/8/130814676/1369606.pdf
    • http://files.grcrowfamily.com/uploads/1/3/1/0/131070190/3426f7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/88675909572.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/article_writing_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/xaburasew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/51954769786.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/sudalinasirirezogoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/7522859357.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/romenutixulofelulilume.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/auditoria_externa_de_una_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/69727706778.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/fulami.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/activar_office_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/jufaxatezez.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/mini_dozer_plans.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_off00006551.bin
2321914c9161ddb6c72945714753cb152fae9089cd3495208023af0cbf447101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 5200 bytes
font_01_sfnt_off000076f6.bin
8c27e6dd3f73dcb55fcc2fcaf4a30b146b88c189634400c838144e3a3851dd7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F6 10196 bytes

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