Malicious PDF — malware analysis report

Static analysis result for SHA-256 278cf8a48707a5eb…

MALICIOUS

PDF

47.8 KB Created: 2020-10-28 20:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a8aec9e7cfc5e508a106ba9243192a9a SHA-1: 92ef612555539887d6507d0748aac600745574bd SHA-256: 278cf8a48707a5eb84e48bcfb3173c469909e94631a7e61b2d8cae7081ad22eb
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/123?keyword=botanic+gardens+memphis+plant+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5f99965e7799b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8c10d00a273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f873d805b123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5f93f5badc1ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f88ce808e271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f948cf8869ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8bfd37813c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f8ce43f92033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f8dcd4b835ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e7c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e7c.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a31d.bin)
    • https://cdn.shopify.com/s/files/1/0431/8543/8883/files/adversity_quotient_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7669/7246/files/48952049557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be44523a-c186-4916-a2b7-c26aeca94468/58762029172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8183/5719/files/lijogamefalewunaximotab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/my_zombie_myself_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3536/8855/files/informatica_cloud_salesforce_connector_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d7696b-3306-4311-8cbb-c09a2e4d7eda/divan_edebiyatnda_mazmunlar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8497/2183/files/pvc_pipe_shoe_rack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/50077802560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d203a1b-2aad-46e8-aefc-7a4185f761f3/kowovuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bacc90-ea89-4f37-9e11-82b2de863114/los_cinicos_no_sirven_para_este_ofic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0740/8800/files/xoxisutekadosozekonolubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9744/8355/files/42602659044.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_off00006e7c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7C 5324 bytes
SHA-256: fb20db95c2354b8dd8b8c722b2dc099c0af67105b42c04cbdb4655febb00f727
font_01_sfnt_off0000805a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 10276 bytes
SHA-256: fa363fb833ece51e4320f4b85c91f3534adbc2d98a0fbd77d676693d134f5c2f
font_02_sfnt_off0000a31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA31D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230