Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca0cba70acfc1ca…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 00:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e881e96c5b07ec385166c81555f5f8 SHA-1: 4a7add996125f4d5a67a05b2906e996a48eb7c58 SHA-256: 5ca0cba70acfc1ca63c98a826425044f3ed490683c82b68a42f29882f6b94405
162 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are part of a link farm designed to appear as software updates. One prominent link, 'https://ttraff.cc/wix?keyword=adobe+premiere+pro+cc+2018+update+12.1.2+download', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting an attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=adobe+premiere+pro+cc+2018+update+12.1.2+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_4a4f14071a4c426f88c4eb5238b1e70f.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_0357c100d71644c8919b2c5b6a423236.pdf
    • https://static.usrfiles.com/ugd/dd4472_7d49a855979b4f50bd5abfd4f6862c72.pdf
    • https://static.usrfiles.com/ugd/b28561_393a9db05b504d12a143a803c9760dc2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/87176593958.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3313/files/pobudawimat.pdf
    • https://static.usrfiles.com/ugd/b8c837_69d46a86d57242f8bd80074e665adb88.pdf
    • https://static.usrfiles.com/ugd/ea78e0_ad182b71bb2e4195b22d6dcdc0da157d.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_off00005e52.bin
05501efb45617d0fbea760126f42ebc95bfb0427c983bbaec5c16d1efffc502a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5816 bytes
font_01_sfnt_off0000721d.bin
82cd13a92e287ed8307811323992dda67a957bc05c400cbf75e919ab9939b328
pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 11040 bytes