Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c364ea2f19720c…

MALICIOUS

PDF

35.9 KB Created: 2020-11-06 19:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e00ee00d65b46f10357133f94e18d85d SHA-1: 54825227fe8a6301a7466e4d41f559ce860d3cc4 SHA-256: 16c364ea2f19720c5f46382ecb26e9c808efabcc35a89ebb5ea01584580c962a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to S3 buckets and other benign-looking domains, but one critical URL, 'https://traffking.ru/aws?keyword=rooftop+snipers+unblocked+99', is flagged as a malicious redirector. This suggests the document is part of a link farm designed to funnel users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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://traffking.ru/aws?keyword=rooftop+snipers+unblocked+99 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_5f9a0f5d80a65.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/8775996.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/negowepuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5fa2e406ab852.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/dudurat/75324293833.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba3e555-a904-4f32-9e0b-36e32055a883/36041811085.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/8645717097.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/12830611881.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/63125483008.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/pojoduwufivutebu.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_off00005133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5133 5308 bytes
SHA-256: 5ce456cd0849751aee9dfc6399290e6d3e5d1b6c2ed95e1238a8ee6a14e7246e
font_01_sfnt_off00006356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 9468 bytes
SHA-256: af6adec04c23a7f981c6a02bfa01631dad0d3ff845d578473180e424e0cb0a95

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