Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f47781ce83dc1b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-15 00:25:46 Authoring application: Smallpdf Desktop First seen: 2021-05-22
MD5: 0d848b47b52bd530ef1822aa8f98371b SHA-1: b56be7ee017f1bbf96aeac62574ecbf899fdd0d4 SHA-256: f1f47781ce83dc1b835df1595e08017a8ae8c022929e1cbc73b8293df0740d12
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many pointing to disposable hosting services like Weebly, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the presence of numerous links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=catfish+and+mandala+pdf In PDF document text
    • https://gexumuvebevo.weebly.com/uploads/1/3/4/3/134312536/7477475.pdfIn PDF document text
    • https://mitezexevas.weebly.com/uploads/1/3/4/5/134525922/rinijibugozo_dabokida.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/lajagisuniz.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/9109928.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/539342c902.pdfIn PDF document text
    • https://tejelodaburibav.weebly.com/uploads/1/3/4/3/134317360/e6c40934.pdfIn PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/temoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_5fa3373f71869.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/tojodepizaduka-wilijabob.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/d8748eb1.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/gesanabinupudo_balepawuremex.pdfIn PDF document text
    • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/7455693.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/ledavixurev_wenedofefatopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zosevid/drop_temp_table_if_exists_in_stored_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/japanese_flower_arrangement.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 4768 bytes
SHA-256: c4f89223bdbbdc6c29b4163c4b6744f844b324290ec49792d9b3134762821996
font_01_sfnt_off00007a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 10688 bytes
SHA-256: abbc86b1048342f3192e8fd84ab94ca850dcc45b190ceedcb0a90976a605a01e
font_02_sfnt_off00009de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_03_type1_off0000b2a8.bin pdf-font-stream PDF embedded font (type1) at offset 0xB2A8 74 bytes
SHA-256: 66e4520597a651f09ad8fe2af9ce002e2735d7ba5ff66d04fd92415068c6750b

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