Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba973cc80f53ae02…

MALICIOUS

PDF

44.0 KB Created: 2020-10-28 20:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: af63fdfddb70500da8f58931130bde7f SHA-1: 737a780f2994f56bdfaf5b4207d456d83e62ba31 SHA-256: ba973cc80f53ae02c2f8ad7a2324aba1e5d7ab4723c51432a0a671f0f58813aa
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://cctraff.ru/strik?keyword=evans+funeral+home+jefferson+ga In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f89262fbdfa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_5f934a6751cb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f926527880a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f905a2b99b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5f94be78561b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f9665c5ce2cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f8d87114d2ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006fc0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006fc0.bin)
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/20685368547.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/haya_bukhari_novels_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/frp_bypass_apk_android_7.1.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5568/4002/files/pakimuxelilunadogoxelumat.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/nanujenibadifaboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0855/6708/files/merge_files_using_creator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf457364-f525-4a1d-80b8-d889ed11be8e/jusuzoranemen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6726/9830/files/hello_neighbor_act_2_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fa5326-6a88-45c7-9ef5-1098f36b99eb/22202999470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6412/1757/files/levapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/viwofojasesuwakot.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_off00006fc0.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 5276 bytes
SHA-256: a0fd13d6385cdbc184d3b16a094465a40d4c8b88a10a2aa672bb90f7fff40b98
font_01_sfnt_off00008193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8193 9708 bytes
SHA-256: e16cc0b753727b5f4dabc4d18ec9727b5c0fa9a857c5928053123e3ecb094f1c