Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f74c895bf0454a…

MALICIOUS

PDF

35.9 KB Created: 2020-08-29 22:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 256bdf81c6c7a5a03325ac7817376f53 SHA-1: c051d21d03396fc16b654a7621afc276cb94f3c1 SHA-256: 07f74c895bf0454a875f3748ac3ef27f12d2fa2de443ed304bde40ecefafbe0d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is part of a link farm, suggesting an attempt to distribute malicious content or phishing pages. The presence of a download button lure further supports the malicious intent.

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.cc/wix?keyword=newton%2527+s+laws+worksheet+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_077801986ce341a8858c1d3b0c43f43f.pdf
    • https://static.usrfiles.com/ugd/b8c837_806dfe3ea78b417c8dfa9f9b6c3a9b6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3803c81a9ee94d22b9525ee52f038ba7.pdf
    • https://static.usrfiles.com/ugd/b8c837_be85e698856c4ec69b958fe88fd33715.pdf
    • https://cdn.shopify.com/s/files/1/0428/6601/6412/files/blender_3d_crackeado.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7152/files/liftarens_guide_till_galaxen_handduksdagen.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/kidumegesolirinakateruf.pdf
    • https://static.usrfiles.com/ugd/b8c837_f101c65fa2fe4cafa78c193f6aab79a0.pdf
    • https://static.usrfiles.com/ugd/921909_1059a78121b1429a8dc5cf53989b1c67.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8177ee939264312bc87960bd83c0ff5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd5105def9649e1a620f65a4156f451.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_off00004e86.bin
2abdcba855a4a7d1cb3a513ee078ff3a452f05b39c26e1cb6dd67c1bd1c36ae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E86 5288 bytes
font_01_sfnt_off0000609d.bin
e302580634bc000ab8d24d5a4a422ea0bfcf499a99e7f27eb78bac84f57eeda1
pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 9984 bytes