Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac9c96bbdc6ed13…

MALICIOUS

PDF

44.5 KB Created: 2020-09-05 21:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a6ccbd619fcb531780f09449da86163 SHA-1: d1908622014c93cebc9b7431a08387e9399638f7 SHA-256: 6ac9c96bbdc6ed139fd23cf38fc9983e43c59f5de89f6be5ca376b2495a05ddd
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that mimic a financial projection template, but the primary link redirects to a known malicious domain. The heuristic firings indicate the PDF is a redirector and part of a link farm, strongly suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence point towards malicious intent.

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.me/wix?keyword=simple+3+year+financial+projection+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a88913aca34a46ac801ddf5c6929cbb0.pdf
    • https://static.usrfiles.com/ugd/cb5dea_03fe5af78b1f4c308aa0166afc54b9db.pdf
    • https://static.usrfiles.com/ugd/185c00_0c50dab7235c4ee293404e89b9a3e33b.pdf
    • https://static.usrfiles.com/ugd/b8c837_35f58c7f1bdb4e2b92f86599e2795825.pdf
    • https://static.usrfiles.com/ugd/cf79db_b5284767d03c409da120eaf4cf0b76f1.pdf
    • https://static.usrfiles.com/ugd/13ae68_c5a934114da24975930f9ddc3e633a73.pdf
    • https://static.usrfiles.com/ugd/04e6f9_16f0afad456c4d73ba65af0049578278.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c9ac6d87a2b44e1a8b8648094a9387c.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_3b3caf4b373d41bf8a9db8ad527db46c.pdf
    • https://static.usrfiles.com/ugd/cb4a18_f0c709b173074c058b23d560f8e0ca8f.pdf
    • https://static.usrfiles.com/ugd/9757e7_12d992e50af9425f929f5708c7b5dbc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c523a31869c47538eeaff3ab465aa72.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_off00006f81.bin
2449ef196748ab5fb32baf2d3188e5a2d4bd666acfb2d8a4364d1b0cf4aa3600
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 5428 bytes
font_01_sfnt_off000081f8.bin
3da82858091ada242202b8e4850b887381cdcc5e72eb68f098ea137d7172630f
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F8 10404 bytes