Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8fcfe32bda993c…

MALICIOUS

PDF

88.2 KB Created: 2020-10-25 16:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f76d5b37c4ecad7bd6d4a7958ae0a73a SHA-1: 564d8b1f56fd2a42b943f83b5df7bfa2e73ab76d SHA-256: 6a8fcfe32bda993cc7986e533f795eaacee3586c28613a8079323c00c0b19b94
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://ggtraff.ru/aws?keyword=celebrating+diversity+through+world+literature+module+3+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f8be0c79a895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f8ed77241b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f9380b6442ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f876f031e56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f8bd9ae297c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5f8fa399a66ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8c4fb18c610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f90f8821c09a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f873d9d68ba1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d78555-46f1-4cc3-bece-de60477c9430/6907888407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e656d15-53d3-44d8-af48-cd24311c05c9/63384658340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcf3e35-6cc9-4043-9b16-9fbc38d28ab7/74571182668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39db3e72-5d34-466e-bc2c-1229382b6f97/dezikadamusinuzetuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f04864c-88e8-41e3-b73d-94ac07c6846c/89429976721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e7e804-03ef-4f26-9e3a-786fd358b3c1/5927471467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/76018911707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8382/2770/files/pressure_vessel_design_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6999/5715/files/anime_go_english_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4857/8471/files/72616783258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4490/4855/files/academy_of_law__public_safety_long_branch_nj_07740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4694/1084/files/pemede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5013/0331/files/66934639666.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_off00011730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 5920 bytes
SHA-256: 3881835ed0a482d14870a19433f452310b757788cb515cdd39ae7e7547407307
font_01_sfnt_off00012b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B38 11600 bytes
SHA-256: 85ed6c6bbe1eab063c4b874b7529d6a01f45919644f9f0216276814fb8438c61

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