Malicious PDF — malware analysis report

Static analysis result for SHA-256 033d5d518644ff2b…

MALICIOUS

PDF

41.8 KB Created: 2020-11-03 22:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d991f92bfc981cd978ae355adbabf458 SHA-1: 2a19cf5aefa9e6f658da62e52e46aec1fbd64156 SHA-256: 033d5d518644ff2b747a19307c96c1c2737ef99708d2a042fbcf2f43d396c917
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a local event ('vfw fish fry sandusky mi') alongside the malicious URL, suggesting a lure to encourage clicks. The presence of numerous external PDF links also indicates a link farm or SEO manipulation tactic, likely to obscure the malicious intent or distribute malicious content.

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.link/123?keyword=vfw+fish+fry+sandusky+mi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f92f95d00ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f97e29b9c8c5.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/7599049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_5fa13056152e9.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/salopuro-dawibibidir-rebofekoninufam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8a246ca8f1c.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/70b7a58b1.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/534f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0fe21d-e1d6-4bd7-9ddd-d88735bb977a/32877194394.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_off000060f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F4 5340 bytes
SHA-256: 8d9c4099a93206b4b96c86a8ad05c0926c2d18c3f14254020b0f42b360dfbdf2
font_01_sfnt_off00007311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 11872 bytes
SHA-256: 0919698b69d36398a56d5ed250de62c5d09a12198f193db9625aeafbe88978cf