Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ba8c1bf4b678df…

MALICIOUS

PDF

64.2 KB Created: 2020-09-18 05:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 45ea07bfcb2bed08054467e55112ef2d SHA-1: 10060d882f237cbdc9eb13911612a23c3dca2780 SHA-256: 64ba8c1bf4b678df746585f5dbdea090e46a546c59c20f8a2b6f830709a3c964
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files hosted on Shopify and other file-sharing services, forming a link farm. One prominent link, https://ttraff.me/wix?keyword=fit+%2526+well+13th+edition+pdf, is identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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.me/wix?keyword=fit+%2526+well+13th+edition+pdf In PDF document text
    • http://wasuva.lisakalma.com/uploads/1/3/0/7/130776046/4724132.pdfIn PDF document text
    • http://files.modified-mama.com/uploads/1/3/2/6/132695829/9101993.pdfIn PDF document text
    • http://vubata.ccstudioinc.com/uploads/1/3/1/4/131408899/7578332.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/1/0429/5563/6889/files/60002083841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/kuxojuradefedowila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/1418/5114/files/48180708782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/63721916243.pdfIn PDF document text
    • https://120ef6ae-3929-49d7-ba5b-66d7cee2e60a.filesusr.com/ugd/d1c05f_09d6c358c8ab4eeb8b452216afde5b4b.pdf?index=trueIn PDF document text
    • https://252348aa-8529-4716-b2c1-c06eafd4046e.filesusr.com/ugd/8bc2a6_07e59d9411e24e1e917f79c8b2b0e4b8.pdf?index=trueIn PDF document text
    • https://0b09adcd-e11b-4603-95ef-4e6c55e389d5.filesusr.com/ugd/f55bec_843995e8da73422d80f5bc9287f2c797.pdf?index=trueIn PDF document text
    • https://b003d304-85f2-466e-bde8-cb86810f6fa5.filesusr.com/ugd/2994dd_6e76f5364d08427bacf555dec875a3d2.pdf?index=trueIn PDF document text
    • https://faa3ea1f-25ec-48da-a218-aa01066eb423.filesusr.com/ugd/5bf82b_8e3c8a33d9414b6aa963827956723e6a.pdf?index=trueIn PDF document text
    • https://b538d255-8403-4621-80eb-6d2b4c71b448.filesusr.com/ugd/c268f7_913e201f8e534f5690e2f5f620d9b32f.pdf?index=trueIn PDF document text
    • https://ff868f2f-ec22-416c-8c98-d6dcfb365ef5.filesusr.com/ugd/4a2613_bea3c08c77f04b74ad61d1b92fc6901d.pdf?index=trueIn 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_off0000c25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25D 4112 bytes
SHA-256: 32f818cc55b95ba6cdcd1121874e353b5a6e3f00c8d1cc511c0a8aabb7a541f3
font_01_sfnt_off0000d061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD061 10592 bytes
SHA-256: 5b35285f4c6101980f97cf680dcfef0a1ca1a209ea1da22edf710dcecc600374

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