Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfdc98251775a5e7…

MALICIOUS

PDF

47.4 KB Created: 2020-10-27 21:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 12dd502a8e00edfa5aefaee10cc567c3 SHA-1: be950b1ed2282a229e76f26bc851b5dbcd451f7e SHA-256: cfdc98251775a5e784a5a9afb2be68e9fe2678fc62441e8231896ac6e440847a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=kenmore+elite+washer+error+codes+cl In PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/kozid.pdfIn PDF document text
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/1433931.pdfIn PDF document text
    • https://gexoronigiz.weebly.com/uploads/1/3/4/2/134265935/kinipal.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/gevunawen-sifux-sibikuz-wolebijukugitag.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/b2c7092245c0.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/6519406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8af8e8a2b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87006bd2845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f89d95bb6199.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e58.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e58.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a267.bin)
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/73266215666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/mathematics_experiences_and_outcomes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/baystate_reference_labs_agawam.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/psychology_book_file.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/muwaroroluvodo.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/58915158102.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/nuziterumijoloz.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/wujarusoduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6015/2488/files/developing_composition_skills_rhetoric_and_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9205/9314/files/termorregulacion_en_el_recien_nacido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/wimpy_kid_old_school.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 extracted file (font_00_sfnt_off00006e58.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 5028 bytes
SHA-256: 0589fb5aa01ade2fb7449788cdac29e42584645bc9b26e6556d18f2c5f850329
font_01_sfnt_off00007f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F47 10300 bytes
SHA-256: 9bc68eff104e2fc1be35e76d780f4fefc93da893b7e36fc4bd04866971b75a47
font_02_sfnt_off0000a267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA267 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3