Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7b250f304be21c…

MALICIOUS

PDF

34.5 KB Created: 2020-10-08 13:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6f48ebc08811f12749778773f4c26bb9 SHA-1: 6a131ab35593be5e5b5c03235d43b5b1b8ce522e SHA-256: 9e7b250f304be21ca2d01941a205e23810a262dde67a9bdd4b7e3a601fa18f1a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a clear intent to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.me/pify?keyword=stow+munroe+falls+final+forms In PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/jigefobesodavoka.pdfIn PDF document text
    • https://site-1045389.mozfiles.com/files/1045389/81941579194.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/34538817328.pdfIn PDF document text
    • http://mejajekar.bjeweledboutique.com/uploads/1/3/1/0/131070581/a035fde757c93.pdfIn PDF document text
    • http://files.dccharms.com/uploads/1/3/1/6/131606630/jubabibewukeras_dotabir_liwadipod.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/bc67b135-1256-40de-a80a-c21c639c0d7f/72175069941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7d124d-ce3b-46ef-b9c3-3cb305bbf9a5/varonodus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225f007c-d7f9-4bcc-b576-a15db872ed51/pexelex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43495450-ae8f-401d-a114-3e878d8d3d53/37346169934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375575a3-4e9b-48f5-8b05-de4dc507e119/79356803028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bb4896-3bc3-4ae7-ae1a-c51776dea146/89231635249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3921bd5c-70b7-4c3f-9d7f-dc9a1b528a40/51463622272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fb7033-b4bc-4c32-86f4-dcde5b2beaae/sivatabopelixezimup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d772c6e6-4495-440b-a28a-7a94800f0beb/pepivaliwafuwikise.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_off00004993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4993 5108 bytes
SHA-256: c37e5dc788f8bebbcbaa76d6e56fa8ffd8b0d707bf693c443c71f2b15455b76c
font_01_sfnt_off00005ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE6 10176 bytes
SHA-256: 07af2e0bfa3f83b175d871195a5d9262f1c3aaae7dba6408b92a37686ec2c645

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