Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed780e23b5cd3ed…

MALICIOUS

PDF

44.1 KB Created: 2020-10-29 10:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 233dfa75d2a4db5c8068abee513ddfb7 SHA-1: 287babe840698c4450a43d862306b473b30ac1d4 SHA-256: 5ed780e23b5cd3ed5cc93f45df3af3c887d6140aeeb30167329737a23ca3e90e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?keyword=types+of+black+birds+in+virginia In PDF document text
    • https://robikonuwobus.weebly.com/uploads/1/3/4/4/134480561/6956448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f9a756063694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f9554ce429ee.pdfIn PDF document text
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/a77726a.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/2491377.pdfIn PDF document text
    • https://pefekebemapufug.weebly.com/uploads/1/3/4/3/134370705/voxojopudobufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f8cffe5de415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5f9a2e527cc90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8fa8f44590a.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/1/0435/0607/3759/files/nobakofit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dac14d0-286c-476a-96d0-219443c6d135/52330008080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7981/0203/files/vopizeritovikisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c90202-121c-4379-87f7-ef3346d001cb/79891888972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/poxafidupasini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7332/6242/files/global_absence_fast_formula_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ec5ed8-0f51-45ad-94f1-c92a282e0c0b/15686789646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810f6452-3ddf-462c-b297-74db4338f2bc/zepudilamemodak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c60c3b8-2741-4642-a5c7-530e1aeaed7a/labeloguxon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf415fa-5682-4cc4-acc8-e41065f7e770/myers_psychology_for_ap_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2227/5992/files/migidefepajizin.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_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 5636 bytes
SHA-256: baa7bc45ad63303f644ed27dcdd802a485e52c2445f49e8f6aa9701d0a2ef699
font_01_sfnt_off00007594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 14536 bytes
SHA-256: 38671632435f0cbde7ecb18d56884c2f7f4f04c1536bff9572de0ea4959970d5

Open this report in the interactive analyzer, or submit your own file for analysis.