Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edbfb86e3159755…

MALICIOUS

PDF

52.8 KB Created: 2020-10-25 20:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 924af1cab27c0af873429505dfae65e5 SHA-1: a3030c362ff1e3a8f94f81e3d6a3eabae39a30b8 SHA-256: 2edbfb86e3159755c3431cddc21001daa5ee00d82b22e70a9dc6f9bed8be8a71
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=chronic+diarrhea+management+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_5f929a563337d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8771d8d8dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5f955a0160faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5f93e02c5e6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f886554328f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f915baa743fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5f8ab34cbf433.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000813c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000813c.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000b773.bin)
    • https://cdn.shopify.com/s/files/1/0268/8427/6415/files/jopenabetuxorofivuvawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/84954793381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/drugs_to_avoid_in_g6pd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4dfe82-e38d-4e4c-bd0a-b123ac6cf121/liwul.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/btc_first_semester_science.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/3636249243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2785839f-e991-423e-8f86-d1e99db0d5d5/pee_little_thrigs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/361a49d6-1437-41ff-a66d-213216d9b602/kedemovusupezamelotezipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2791db2e-1af4-4357-ad6b-51fcac79f846/46339285000.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_01_sfnt_off0000813c.bin)

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000752f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 3368 bytes
SHA-256: 3e415a55d2624e5bf0bcb2b10fc83ba9303cdcce75e5e917ca13168c2968fc99
font_01_sfnt_off0000813c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 5260 bytes
SHA-256: 4497fcdf7c59342bb66882770127238ead623d2ccb4d893f42ebadece1dcf302
font_02_sfnt_off000092e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E4 11176 bytes
SHA-256: 4ddd43c1a6058b59a6a5f9351d7c87096a9b79888845a03488c0c9900d6c1596
font_03_sfnt_off0000b773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB773 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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