Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6478db86de9e58…

MALICIOUS

PDF

75.0 KB Created: 2020-10-05 10:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f313b42173b3f9149f5af890aeba6a1f SHA-1: 0ace08ed771d55fdafcdc909771caa263093b8a1 SHA-256: bf6478db86de9e58dbb1b25c4f9db453acbdf2a4afda00b5215bf9a50c03aae6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link disguised as a book download, which redirects to the malicious URL https://ggtraff.ru/strik. This URL is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and embedded artifacts suggest a social engineering lure to drive traffic to malicious infrastructure.

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://ggtraff.ru/strik?keyword=descargar+libro+como+manipular+a+cualquier+persona In PDF document text
    • http://files.garfielddiamondsports.org/uploads/1/3/2/7/132740339/gixozerewi.pdfIn PDF document text
    • http://sazugage.pawsandlove.net/uploads/1/3/0/7/130740323/13be5b1c.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/1/0266/9858/0145/files/fantasy_age_bestiary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0303/9903/files/34004299353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8337/0148/files/shotgun_shell_catcher_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/cigar_shapes_toro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7742/6588/files/9614072836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7262c2b2-7fe0-4cf4-9b4c-e28200200b89/79097300130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8fcef55-31c3-42c2-9435-6401443b3fe6/mirukogavotekaxaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d3570d-580c-4af4-8fd2-49588ca50c4c/vasojivekofozakinapej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ee1ff5-f7d0-4f61-8e47-281face49a5b/40772704463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce2e015-5e2c-4d61-94c5-8957d2021857/37656988777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68494f-445f-46bf-9816-e200fc9d5e8e/73903259278.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_off0000e371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 5520 bytes
SHA-256: fea06d1ecce976d0fc2958ea644a7d41c64999436542f9f097ee86ce901aab87
font_01_sfnt_off0000f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 12016 bytes
SHA-256: 95074e9a019ab6af8ece75b424a22e69c3f6cd9eed59a6c6dba6f0a08c9f5ffe

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