Malicious PDF — malware analysis report

Static analysis result for SHA-256 477bf1d460d9d710…

MALICIOUS

PDF

39.5 KB Created: 2020-11-07 23:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9f51dfee7d23cac458120293a3e5f96b SHA-1: 70e0bc4254ef12ea44f652f395b65aab28567974 SHA-256: 477bf1d460d9d71097ede08824e4213e87dd1f503aad9ea4393c49a1b459a96a
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating it hosts numerous external links, with a primary malicious URL identified as 'https://trafficel.ru/aws?keyword=disney%252B+roku+4k'. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to streaming services and the malicious URL, suggesting a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=disney%252B+roku+4k PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5f8d7c09b0d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f9b3feb674f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f9cd86b3d7b4.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/8d73d9d8-7007-4ac1-857f-a2c0240e8923/36768693174.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/swarovski_crystal_figurines_on_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/77193301603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5679ec0-625a-4809-a13e-9f88e5f13753/52080090040.pdfIn PDF document text
    • https://zizogugegune.files.wordpress.com/2020/11/wepamef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bcb494-99a2-46d3-8cad-c0f89a2ddf1f/bomipemifuratibewerifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df17343-55d1-46f5-8f4c-df5e6ae54c69/objective_test_mmpi.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/kane_and_abel_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3de5f6-fe4c-43a5-8c32-57361ed64ebc/17794643470.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/g_major_triad_treble_clef.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/jamowepusologugu.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_off00005de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE9 4688 bytes
SHA-256: 888ed22a26e37ac9dda2cfc76e920d35ebcfc275a28241337915454fdf632f44
font_01_sfnt_off00006e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 10444 bytes
SHA-256: 2ca96fe451a7be7a43d7e2dbe4860e4bdfdfa56d2e351208fefeeae68ab0124a

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