Malicious PDF — malware analysis report

Static analysis result for SHA-256 a846b24697dfd66b…

MALICIOUS

PDF

56.9 KB Created: 2020-09-30 05:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 54c588c22846bdddad3bcd59efaa7a61 SHA-1: 79496eae51c47307a3eb5e2c8024fdb91711a8ef SHA-256: a846b24697dfd66bc016559ef706b76de295e18cbf56fa009874e65c43a24df6
94 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely spearphishing, with the embedded link serving as the malicious payload delivery mechanism.

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/strik?keyword=swing+trading+strategies+pdf In PDF document text
    • http://dolesil.red-lotus-consulting.com/uploads/1/3/1/3/131384635/9beacff.pdfIn PDF document text
    • http://juvukuge.lancergrad.com/uploads/1/3/0/8/130874153/8ef07d6f505.pdfIn PDF document text
    • http://wuguvivod.redriverministries.com/uploads/1/3/1/6/131606490/puxigim-zafisuketoretur-diredaf-soluk.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/1/0436/6693/1862/files/luzekagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/6343073823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fd87c1-dd2b-40a5-a54a-0845bd5a0483/gowolubikowiregovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02baa8e-ce25-4c76-be4a-4593167df0fe/19824768191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44914892-f060-42a9-b539-fffb06efd6c3/59703193878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a2dab3-4378-41a0-ada0-001198e057a6/nidenitanibonevazune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3085feb-1788-4507-aa2a-0d7d709ffd8f/63548790960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45db10d-fdfc-4bb5-8921-d459cbf941dd/zivenavalopuvejexonuwutun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22358379-d1dc-420b-91b4-3a7880fd7971/65500967130.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_off0000a12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA12E 5372 bytes
SHA-256: d09571a9d782789e3bdef1c8db513982b5f0f710445e947544532851440c678a
font_01_sfnt_off0000b399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB399 10336 bytes
SHA-256: 508cbf5c747043607570e071380d0bc6c6944668cc95ab961558c8536eaa4e05

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