Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7e4d15bd979498…

MALICIOUS

PDF

46.5 KB Created: 2020-10-14 23:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c0226aeddf539fc32822d3f6db006ee6 SHA-1: 238ff84a2de95cd8f32a4ad96c0151f857db1bae SHA-256: ff7e4d15bd97949879ed9cbf04663857e799298206bc5297f3a321498466cd57
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/123?keyword=osteoarthritis+exercise+program+pdf In PDF document text
    • https://site-1041779.mozfiles.com/files/1041779/85714487797.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/20750262047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f87136c660c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f875fc0dd4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8706ee13dd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8758cc7d70e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f874c8ad6079.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/7756668.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/pizebiguwevekom.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/9fd55072845169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1573/0886/files/gunenelebidovadelod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/sunitebebivejere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1790/3521/files/bust_126cm_in_inches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1181/1739/files/wiwugakasekivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/tewinaperizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5600/3744/files/lumawo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 5316 bytes
SHA-256: 24d07829568a29c8b3d15519abe536fe513fefe925276e75a5672956368a51a8
font_01_sfnt_off00007b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 10452 bytes
SHA-256: 932d8417aa5d4a531d099c73c479b7ec4f3ae1f789e77c41352dd9844d1de322
font_02_sfnt_off00009ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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