Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d5e398ba075a43…

MALICIOUS

PDF

71.9 KB Created: 2020-10-28 14:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4bc5b54abf9cf0c6234ea2d831135915 SHA-1: d106653bdf4d1f046f8aed28bb6df357c81ede9c SHA-256: 20d5e398ba075a430d76cd8445e06f77be191af34dbf0edf2217b693ec9043dd
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/strik?keyword=letting+go+david+hawkins+youtube In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/94d3e5e61cca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f98827976ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f873d406a2fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f87d263b5a41.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/384333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8813bba69fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f94caaaed10d.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://cdn.shopify.com/s/files/1/0434/4584/6168/files/jigeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47ae110-6277-484e-b6f8-d5a00c892064/60200640755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b2ef2f-92b7-41c9-a614-6a4a805d1d9d/vivofinulegovima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487d644c-88d3-4911-b6ff-eac1bb95d1b5/sujiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6433741d-f1a6-4731-8679-65859d23eab4/fezizedilevalubel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5867/1015/files/little_caesars_pizza_franchise_cost_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e557708d-f4d5-477e-9919-4b0f5ac0faa7/59508051121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5db48c0-a958-4a84-82f3-2b1ea94acc7b/pawigatowefidexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/nivegarej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848ec613-7509-4325-8b52-04a3034a565d/85194347090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6052/5221/files/dotatidowusova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1219/6005/files/vibemerubanozakix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4417/0647/files/22872560480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a40bbf5-2102-41c9-84f7-867974b16f8b/84067793569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8799/4263/files/cours_topographie_gnie_civil_2eme_anne.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_off0000cbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDD 5240 bytes
SHA-256: 01497921c2edf53d85ef91b1181a6320ca18b7b9b35cf5f85d9954a70f435293
font_01_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 11488 bytes
SHA-256: ff81aded643a018a77ac3b0b31a60889cf54d3ff2c621409a408c405defd1926
font_02_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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