Malicious PDF — malware analysis report

Static analysis result for SHA-256 288ec5e18a6a8b05…

MALICIOUS

PDF

35.6 KB Created: 2020-11-03 16:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: de805d2bf1da44fa64f88ee67d4503aa SHA-1: b85f3187ef9e49e857e759f825abe0ede54636cc SHA-256: 288ec5e18a6a8b052e0889881b9451c48aac48f791c5e92d85dcf55377248dbc
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'melissa and doug magic set instructions pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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.ru/123?keyword=melissa+and+doug+magic+set+instructions+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f95b99f43c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f8b7056b6c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f931d4d8cdf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8e21ed34146.pdfIn PDF document text
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/6767e4ec80b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f9bc35ff127c.pdfIn PDF document text
    • https://tewavifoma.weebly.com/uploads/1/3/4/4/134482239/f537513d5bac.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/84896881-1eec-40f2-991a-94c19550d9ed/62029773119.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/43808143368.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/7590945912.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_off00004c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C04 5480 bytes
SHA-256: aefbc6e774002f74decbb9daedd0c0dc08f891a9f9d5866c37882ff1eff171a2
font_01_sfnt_off00005ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 10464 bytes
SHA-256: 47bbbe64b0001b11a21b486bd28f5fea3d41f3a941f801018562f39ff42439b3