Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc444ac91c381e5f…

MALICIOUS

PDF

40.8 KB Created: 2020-10-07 07:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1b7d7182904b13ebdf7f3402463453b8 SHA-1: e297ffb58e8530d888b6dd8c5f4cc38faf52878a SHA-256: cc444ac91c381e5fa6895153b812af9aa33c05caf96c48cedf6bb61dfdba35f5
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=trapped+in+my+mind+wallpaper In PDF document text
    • http://files.thearbroathspitfire.com/uploads/1/3/1/4/131408170/2094815.pdfIn PDF document text
    • http://muroli.davidtarullo.com/uploads/1/3/1/4/131407316/5638311.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/1/0434/2117/1879/files/bear_whitetail_hunter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/71935286466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7589/1100/files/vocabulary_unit_3_level_f_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9163/1509/files/dumuxejopukuriwometefisun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1223/3637/files/frozen_chicken_breast_tenderloins_in_air_fryer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/clash_of_clans_mod_apk_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b71a2a-bb39-464a-9e6f-e7b06870bff4/nubajunajejoxiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15632669-4278-4abd-9e98-0e376b46ba8c/34754297592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/526511c8-a759-4aaf-9f7a-7a1d7702165c/fazitilokifigawufepod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089d2fd4-e619-4aa8-a6e4-93045488cbf5/sixowixag.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_off000060ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 5072 bytes
SHA-256: ef1d6bee4d626f9ab5fd50463bbb4c736604eedcc8f889113e6817b23ae11992
font_01_sfnt_off0000722b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 10616 bytes
SHA-256: c4d0b7be442a535fe2e3d04f24d88bbc3072e50152a9f04a073aca2ca2fd0c5f