Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1519f202571a21…

MALICIOUS

PDF

43.9 KB Created: 2020-11-02 20:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8a1c12d114a3c10414730c4fca7615cf SHA-1: 1d2dae78a567089ed1a29657ae92725a3ada04b8 SHA-256: 6f1519f202571a210ec5de0c18d193f8fe4a69e2b6d9c54ea4c39fe5d15496d0
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/aws?keyword=how+to+paint+snowflakes+on+wood In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f87047454abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f971dbdda9d6.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/2899710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5f8fc4727e3b2.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/d1d059cff661d.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/rapotikezu_fisogivix_mutiretebiga_newegufikewekis.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006017.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006017.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000953d.bin)
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/ximejetosagutanunaxatuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9102/3803/files/prewriting_vertical_lines_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8286/7397/files/lulatiwawuzadujezejejeko.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_off00006017.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 4844 bytes
SHA-256: c9fdc46acd30f172a9a889a81af8b85b5662789d689b1aa2697eaa6e18cded26
font_01_sfnt_off000070a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A8 10992 bytes
SHA-256: 8ce8649826bc0ffa063f5d2533a0f2354409206d9a75ab228b9c687aef727647
font_02_sfnt_off0000953d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e