Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4cba5c29d680d4…

MALICIOUS

PDF

46.2 KB Created: 2020-10-26 15:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94b94ec65aa97a8039da83637c0a0867 SHA-1: 9adf275fd3d486947b2e13f364b71bba87ae6fe2 SHA-256: 1f4cba5c29d680d4973026e8ae6fe66185c306ae5e76594aaf51619fa0e6612b
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is flagged by heuristics. The ML classifier also strongly indicates maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?keyword=alesis+nitro+user+manual
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f950700dee3b.pdf
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f86f4c78e134.pdf
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f92c785db954.pdf
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f8a1cbf37186.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f92597a11f31.pdf
    • https://cdn-cms.f-static.net/uploads/4388613/normal_5f916422e8915.pdf
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f87022066875.pdf
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f87142001ffc.pdf
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f90a4fb59eb1.pdf
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f87020b57a70.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8ba77fda7f7.pdf
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5f8dfe98e08fe.pdf
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f87019da1557.pdf
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f88965332ae2.pdf
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5f951845ba3ac.pdf
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f87a76946b81.pdf
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8af42627392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dejolavubukugeb/jufikas.pdf
    • https://s3.amazonaws.com/sugaguxagu/java_programming_books_free_download_in_urdu.pdf
    • https://s3.amazonaws.com/davubewu/buckden_pike_walk.pdf
    • https://s3.amazonaws.com/leguvefu/9661603604.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_off00007749.bin
7a094c5135411cf84e9f163de46a9d465c2cbeb739f0840b05c2115aad27a72d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 4820 bytes
font_01_sfnt_off00008788.bin
5fdf99573c9b4425682c154d23da5f3e0d0f95c782cd4c1f957013896fd7ba20
pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 10424 bytes