Malicious PDF — malware analysis report

Static analysis result for SHA-256 7050ade7734e8474…

MALICIOUS

PDF

42.8 KB Created: 2020-10-29 21:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 85c6923fe72184529680e4180d4f3238 SHA-1: ab0e5999c8e572b630265085263cc313f4931987 SHA-256: 7050ade7734e8474f6c63f1c615de35db70f4e806186974f8e583d6fe0320e38
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.me/123?keyword=examples+of+imagery+in+oedipus+rex In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f87224b49375.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/d459d10bffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_5f9a698367232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86fed5b3038.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/6fafb8d0acf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5f8dd043cf5e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/89031926656.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/alopecia_areata_difusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1999/9645/files/xujetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/voter_list_jharkhand_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/atkins_phase_food_list.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/novolamoxusutadiduxada.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/pdf_to_word_online_converter_free_download_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/indian_road_map_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7892/7011/files/fexurujetajusuxedimipul.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/sing_sing_sing_andrews_sisters.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_off0000693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 5488 bytes
SHA-256: 87d6d44cf67369e8af2ba0f27e7498060b5dc6029b9c7bcbabd7816e4e2dcf33
font_01_sfnt_off00007be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 10056 bytes
SHA-256: 3f32c53658998ae9bd787707f1167d19a95c948fdb30b51051fffdeae59b2574

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