Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4421faa3e32eb59…

MALICIOUS

PDF

43.4 KB Created: 2020-10-26 13:21:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2dbffe691a915ca6a2da909ae63a12b7 SHA-1: d53b1079d99c7edab22c548ec2170cf9f27cee43 SHA-256: e4421faa3e32eb59ea503801024420d4293d52ec19ee73916142b22757491854
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/pify?keyword=isometric+to+orthographic+views+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5f951fca2bd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5f8b7d7b58d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5f8a22cd4906a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5f959cac909f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f8df166b409c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f8b7b5a51d09.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a80.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a80.bin)
    • https://uploads.strikinglycdn.com/files/132d7090-7a7f-4f07-b752-40f1e00694d4/32179123588.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/levejidemunubejaxevoxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/reflection_refraction_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dawisowiluzokezejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9762/6021/files/lilom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/99320461783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9924/5723/files/name_change_after_marriage_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7120/4245/files/geralokunelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/emotional_appeal_in_advertising.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8661/8017/files/calla_lily_meaning_death.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_off00006a80.bin)

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A80 5628 bytes
SHA-256: 8b08e41e1e02ef6e21ac76bb712565b6bc22727c388d2759573400cb435319ef
font_01_sfnt_off00007d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D98 10368 bytes
SHA-256: 7896ce0e08f751ba3bd4771a230665fcf8c904399de82fe995f8ea0fe5115b3f

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