Malicious PDF — malware analysis report

Static analysis result for SHA-256 8518865e6578fa0a…

MALICIOUS

PDF

41.0 KB Created: 2020-09-05 07:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2d8a1c039e35f739811b690c976bb76 SHA-1: d1077016eb59023f8890bcb77a3b8b36eb5dedff SHA-256: 8518865e6578fa0a4439ae7c233994a281429140821569475673d6a8466a819b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one prominent URL leading to a known malicious redirector. The document body, though partially corrupted, includes the same URL and a deceptive title suggesting a report. This indicates a phishing attempt to redirect users to malicious infrastructure.

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/wix?keyword=sonarqube+jacoco+report+path
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/078c79_f158784a62444d9a8c708a245ed29825.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_2eb70b2a4fba4ecca6744b063645f091.pdf
    • https://static.usrfiles.com/ugd/111c46_27446d07b5ac4693b042fc8c30f1f0ec.pdf
    • https://static.usrfiles.com/ugd/d5cf39_80a6d89b9fa04097828cf2bc4941a6b5.pdf
    • https://static.usrfiles.com/ugd/b4609a_4c875c876c4b44d0bd9b66ccea7c943a.pdf
    • https://static.usrfiles.com/ugd/afe78f_a1639878ee37406d8ff897a4a9272993.pdf
    • https://static.usrfiles.com/ugd/a72fa8_d09870a7f7a241e383c73ae8ab6d7695.pdf
    • https://static.usrfiles.com/ugd/136d07_299c3ddc94a944208ee9740d9249842f.pdf
    • https://static.usrfiles.com/ugd/fb83f1_942bab6b816741a4a7e4505b7cbebb6f.pdf
    • https://cdn.shopify.com/s/files/1/0440/6607/8870/files/77789878361.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/rosewonaputedakubevefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8263/files/7165238851.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/rirozubun.pdf
    • https://static.usrfiles.com/ugd/740d8c_a69ce731a0b947718b2355358aec170b.pdf
    • https://static.usrfiles.com/ugd/930050_c2d5f9fe388d477e9e55c001cc504d7c.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006029.bin
5532388affc99004ef06a74807106ab748bbd5e14ab0f4b736ecdc8354c0b005
pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 5256 bytes
font_01_sfnt_off00007209.bin
2abe4f89a322d4c5a1166b740f847226766aa8cc20c145c211fa03f1b3a798d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 10780 bytes