Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d73bff8289557e1…

MALICIOUS

PDF

41.2 KB Created: 2020-09-02 04:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af919a32f0aae64f715e40f21ce6a20 SHA-1: 6576852b1b116c50fe426cd73affdadd3ee6f5f0 SHA-256: 6d73bff8289557e191bab8fa691cc9bb506403086d42cece1496fe9300f68de2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector infrastructure known for malicious activity. The document body, though obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution.

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.com/wix?keyword=calculate+dividend+yield+from+balance+sheet In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e3ff21_807195c4cc6b488d87f5cf5c67610fdc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/086daf_9fc4eb4a4dc942f79b925b5e568dfaf7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c6ac46_a71b922a2ef64b3e91960ead7861e9c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3be3a7_4b1f68ac8ea94df8a8863fd17459934a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9edd50_3a1f2858418b4afebbd2f82667627eb8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_74ae297ff93b4b328d2d254a0eeb62d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/89064d_0fb91e80e9944d76b81550fc1f10f058.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de02f3_4798cf39c4bf48349ea3adadc6638e7a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8a419d_ba37329fa1254ebb8a9bb4b229faa902.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4d6844_83300938b4a547a7bf1bfc7d1efd643a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9e41f0_ff9e6bb5df194e8f83ecc2ca02ef8694.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b58d21_d526a2d3f5ec42ecb4a4a6415370e041.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/225520_baf97d79e2fb4ba1a3b060f138cd3d52.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c7a620_8d1a4659eb864d3ba9a0a2e50f3d9dec.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/04c368_bda98a1b42e14663b729ec6e980aaa58.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_47e9a429be1e4763a90f3b4f09320ff2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_47b75c2ec8b442cbbc60aa9968ffe8a5.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_off00006158.bin
3292a1357f7ad90219c400e91afabfe2bad368a5e066b1f4c5de98278e9cccec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 5468 bytes
font_01_sfnt_off000073cf.bin
5cb744afdb1c97f006960e09db4951b9f484dd9fcf23afee2084e6242d6d425c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 10488 bytes

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