Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17173aa2eb1253c…

MALICIOUS

PDF

38.1 KB Created: 2020-08-26 04:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e14dd35f861b5489f0e69be5183ca5e4 SHA-1: 205a306fc369460e2042ec79e20fea03a2f92781 SHA-256: d17173aa2eb1253c51038b1a6f1e09d690229d8756028a749f4d5a5b736c5012
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://ttraff.com/pify?keyword=ap+world+history+matching+trios In PDF document text
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdfIn PDF document text
    • http://files.brickandbaking.com/uploads/1/3/1/1/131163872/fasatumibovika_pomijurud.pdfIn PDF document text
    • http://files.vprakash.com/uploads/1/3/2/3/132303238/8767865.pdfIn PDF document text
    • http://silop.thedoorkids.com/uploads/1/3/0/9/130969057/e527b.pdfIn PDF document text
    • http://nujitup.vinyldesignyl.com/uploads/1/3/1/1/131164250/4e912157d0a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/giwiguferujila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6708/1639/files/atvio_smart_tv_40_manual_de_usuario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/bedupawuvima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/vewitipekakebixanaxomubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/best_legendaries_for_ret_paladin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/best_cv_layout_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/xewakibudogedap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/vosedamuzojupizazizuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/zuzovuraselitem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/wujexanigoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5223/5938/files/74614096206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/58947148668.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_off0000569e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x569E 5672 bytes
SHA-256: f6b287fb1b41929f481f991b8c7d1a53c2e280a190eab98e513433b311f3c664
font_01_sfnt_off000069cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CD 9920 bytes
SHA-256: a502b7d190c9bf770827f085fe382c63cea33fe1baecd23b797ac8ed5077cc93

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