Malicious PDF — malware analysis report

Static analysis result for SHA-256 75691040e72604f3…

MALICIOUS

PDF

37.7 KB Created: 2020-09-09 19:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af8c455e6c2294e1eb06c40e3b76e173 SHA-1: 36b85c79ed11ba365eac82fd6b75eb3ed6ab6a2b SHA-256: 75691040e72604f3f28b9edd1640cd2ae70e7d3b3cc89ee303fdac8dc6499b7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector infrastructure. The document body, though partially corrupted, includes the same malicious URL and a seemingly benign topic, suggesting a lure to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/wix?keyword=copy+sheet+function+in+excel
    • http://files.oconeebellstudios.com/uploads/1/3/1/4/131438891/rilebura.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/bumokuzetesixax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/xetavalexubibelamotozuvoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/tosomaxaxo.pdf
    • https://static.usrfiles.com/ugd/7198c1_8494f4399ab64b529d70d1e0ba709e04.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_dde91e19e07a406d8806fc3f7f69b48e.pdf
    • https://static.usrfiles.com/ugd/01d500_aa9c05da12f04f258b45ebfeb035d250.pdf
    • https://static.usrfiles.com/ugd/96564c_f9cebed3ad30434a913197c05a30da6a.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_off000057d2.bin
003af09a66f716774c29a31adbb911069d95ab6a96cb90951dd31f5c51fb42a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D2 4872 bytes
font_01_sfnt_off0000687d.bin
9bc50002b21de549ec1a3d2808a9781f0310687c59727ff19c745e6aaab780e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 10060 bytes

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