Malicious PDF — malware analysis report

Static analysis result for SHA-256 31da9428898c85f9…

MALICIOUS

PDF

40.9 KB Created: 2020-11-01 09:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3cc0849bdefacc2862ebb540581e007f SHA-1: 76ff3649ca194341f33cac8b66bcf7a0e48a28da SHA-256: 31da9428898c85f93a10dbe1f9b545fbaa7d775676163fb8921649c55419b824
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, disguised as a helpful resource. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the primary malicious functionality appears to be the redirection to the ttraff.club URL.

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.club/123?keyword=how+to+draw+anime+anatomy+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f8fc72a58573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_5f91f926af26b.pdfIn PDF document text
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/junodi_xefebow_pasigovujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/natusekokep.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/phet_moving_man_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/blog_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/rogivivuxorimapizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c066ee-24db-407e-8ee3-b1066cc4d9dd/tuwifimotav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed56c501-e631-44b4-b475-eae282d24885/72457749524.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/77996999729.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/79773140498.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 5132 bytes
SHA-256: 0dea561dc1578822a8d18f1c5485c39c3479ad20a23675c0a64694420a7a61b1
font_01_sfnt_off00007595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 9772 bytes
SHA-256: d3f1d5d0044159b4e21bd7e41d422edd829843b9303946dec05410d51a0097e7

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