Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ea8c518feefc03…

MALICIOUS

PDF

52.6 KB Created: 2020-08-30 13:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d070e5f17119f538105781dbfd88fe55 SHA-1: a65a51529d7d6e0c892c8ff262a698fae4320082 SHA-256: 10ea8c518feefc03350a0e26b31a5a2641d4bfc599c854eaddd931bab7a3039b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to unit conversion and the malicious URL itself. The ML classifier also strongly indicated maliciousness. The presence of numerous other benign-looking PDF links suggests a link farm tactic, potentially to improve SEO for malicious content or to obscure the primary malicious link.

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=convertidor+centigrados+a+farenheit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9dda13_31b53f7ca5a14ebbab6fda8529042649.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ed77a08ea746e39774dbfc7ea47fd7.pdf
    • https://static.usrfiles.com/ugd/99965f_fdb33410442c4077a159720f4f3da17c.pdf
    • https://static.usrfiles.com/ugd/784815_1dfed95113fc486ab06ab08aca60132f.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/towofopizujugogu.pdf
    • https://cdn.shopify.com/s/files/1/0449/3587/2667/files/calendrio_2020_com_feriados_rj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/potebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7125/files/design_manual_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/kubom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/nenoda.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/dv_lottery_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/55197624944.pdf
    • https://static.usrfiles.com/ugd/b11f6d_f3712a6b002a43f8ac84c69e4112b260.pdf
    • https://static.usrfiles.com/ugd/b8c837_928da8534db641c1a63a7a9cb8334c3c.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_off00006ef6.bin
5c7f7af7281e1b17a61f4ba6c354c8565e261568e6bb34ce35ddeda6443f949b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 5216 bytes
font_01_sfnt_off000080b1.bin
9094e5ad92a889d9747e79da4f5c77a75164fc2874d628caddcf655bf5e79b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 14924 bytes
font_02_sfnt_off0000af86.bin
b13feff8c5b564f7677060085945be61112f8f7aeeaada995cbedf689070d2bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF86 16416 bytes

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