Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae40e6cb896277d…

MALICIOUS

PDF

36.5 KB Created: 2020-11-03 15:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4d7a6017ff1961cb35a28afd6f65a12 SHA-1: bea152e29c22a211c42ae4abd452bc9ad7a397e9 SHA-256: dae40e6cb896277d824d4f9ce94061c0ef4737ee13dc65bd1293cc07dbe78bcb
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded URL, 'https://gettraff.ru/123?keyword=bing+popular+education+tools', is the primary indicator of malicious intent. While no scripts were extracted, the presence of a malicious link within a PDF document strongly suggests a phishing or redirection attack, likely delivered as a spearphishing attachment.

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://gettraff.ru/123?keyword=bing+popular+education+tools In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_5f9f7bace5d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f97a2c032ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5f963e436aec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5f9f277324dfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f8c59be16a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5fa130714f628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f9234a98f032.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/3eec9d49-f8e8-4ac8-9da9-91af481639d0/kukuzomaxisibividupitux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087e4fc8-5fe7-4a48-865a-26130180008f/ridupowolusebujapidaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b0f451-756f-442e-898a-3263225f9c48/29025362922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c33247a-1ed2-4fee-9953-88e0eedf3604/86049929777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48498f4a-c906-48de-bb91-0c307edb8eb8/6098441874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd65461-0d5b-459d-95e3-795353e4215b/76417458373.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_off0000504d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504D 5292 bytes
SHA-256: c2eb34beb0b94ac6d07359a11bfaf8d5060dc76aa8c3208ec4cc1167ca1e3202
font_01_sfnt_off0000625f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 10128 bytes
SHA-256: e438f5e1baa6776c987e04c8280ea568988fdfe8771f0dd12ca43c6deadc6af2

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