Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1fb614f90cb632…

MALICIOUS

PDF

46.1 KB Created: 2020-11-04 21:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 46de80304c96f6dfe6a8f17206660d34 SHA-1: 9dc8b356a3d5f2ae8732b178bf7abb0566d4962d SHA-256: ce1fb614f90cb632d41c1779cfa723e262521d02ebe5510692db04915ed23b24
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, indicating an attempt to lead the user to harmful content. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a phishing or scam attempt. Although no scripts were extracted, the embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users to potentially harmful sites.

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.cc/123?keyword=built+to+last+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f87095c99ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f87386fce47e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f870128189ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_5fa16bc1b1088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f92ccbf7b221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413000/normal_5f9e4f2cb0a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5f9fcc1350db4.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/8a72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5fa1ed082d7c9.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/jemazejodep/18094558443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37476c3-14a7-41dd-970c-1f2031cd81a1/how_to_draw_stairs_in_perspective.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/4029934314.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/19317262014.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/jitod.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_off000075f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 5080 bytes
SHA-256: 2f1d827d7244831d98ef6012bce4951651d926f0e73548047ef89ad461c4c792
font_01_sfnt_off00008764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 10676 bytes
SHA-256: 7b6826ee596d9737595e49aaca780a5e0fbde2c1f7a639e8896f8ea4cea42481

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