Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d061942c15834a…

MALICIOUS

PDF

34.7 KB Created: 2020-10-08 03:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 77931072b3f5d45baf09ea4cb14c1898 SHA-1: 98ccd6ba654cc528e630da484a071e19b110095f SHA-256: c7d061942c15834aa62578ad4831dd87cf4ba97e085b18bcc69c86d514021bd2
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firing suggest the document's primary purpose is to redirect the user to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=enriquezca+su+personalidad+littauer+pdf In PDF document text
    • https://site-1041079.mozfiles.com/files/1041079/46471791640.pdfIn PDF document text
    • https://site-1040339.mozfiles.com/files/1040339/64074978400.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/lejesakup.pdfIn PDF document text
    • https://site-1043215.mozfiles.com/files/1043215/naburaramixefale.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/tiravumipesizodamonokot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3311/1961/files/mountain_mtg_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdbdf05-e390-46c1-b3bd-63f15211e768/xedudodiduxodex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf335721-d254-498a-bbe9-f7acf68568a3/78202502660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57158343-a078-4960-807a-63521685c434/mobusijebodedapasefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d11c230-8b70-4ade-ba0d-f4a25cba239d/53904479962.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_off000047d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47D6 5284 bytes
SHA-256: 708661917bfe60493609ef367d941657002c88df098bc69b07fda4a8641d8154
font_01_sfnt_off000059e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E5 10580 bytes
SHA-256: a1032518bf8f07a5df4b8e6ae0b2c2239cfe4b54965204def2ecaaf002a0245a