Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d01638643ae2298…

MALICIOUS

PDF

48.2 KB Created: 2020-10-02 16:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aee731adf894d0697a4947ce5458c20c SHA-1: 5e7713e19a552fe11bfbc9a871393a113a22245e SHA-256: 9d01638643ae2298fa01eae26d27303d97a638be982c2e215064ab2933fdef31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The document body, while appearing to be song lyrics, also contains obfuscated URLs, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=wishing+on+a+star+lyrics+bts+english In PDF document text
    • http://files.green-hopefoundation.com/uploads/1/3/2/6/132681891/1b34e651.pdfIn PDF document text
    • http://files.bagribybagri.com/uploads/1/3/2/6/132680986/1780476.pdfIn PDF document text
    • http://jigor.breezyvalleyranch.com/uploads/1/3/0/8/130874478/358599.pdfIn PDF document text
    • http://files.oma-cob.org/uploads/1/3/1/4/131452935/rubumekilifanusozu.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/14f8c292-6ccd-49df-840b-fe92970d37e0/woxozisodolagevamoral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3abbdf-089d-4586-8d52-faa8e5f660d7/vufutuponazewadodukisavax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0801e8ed-2c9a-4713-bdcc-a9194c3263d9/13510882282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/boziravekemulolifedodonaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/ford_dental_huntington_beach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6c4e21-5718-444e-8ab5-903cd5b7d2fa/nemekibabifidis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f5aa47-685f-44bf-964b-25f376b7556b/95325222972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4a6f99-e0cf-446e-816c-e7244b4d2a70/tubawemijazopomijemojidol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A4 12220 bytes
SHA-256: 42f9f165905805f9dd17b8313c30cb45df850a90b5df39166db9c69d19f130fd
font_01_sfnt_off00007f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F60 5316 bytes
SHA-256: e2c0190e9c69c0a61d9bfe5e966da5adfd6b9a07bc422576eb139be9823c786f
font_02_sfnt_off00009187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9187 10004 bytes
SHA-256: 29e23579373c0a0c5bb210ecc1448e900c03f1b6f138ae662952e73ab7d72747

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