Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eccca55e52ca357…

MALICIOUS

PDF

48.6 KB Created: 2020-08-26 07:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fc806e29bb218e372fce99f4fb2d0530 SHA-1: 27754e28c3efbe6857a3d4d5c1d17e129e2fb4a3 SHA-256: 4eccca55e52ca357ea08669fdf368ad1587d71a49165fec8fa2b7a4c684b198f
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.club/pify?keyword=dremel+accessories+guide+poster In PDF document text
    • http://files.sgesurfreport.com/uploads/1/3/0/7/130739922/8279635.pdfIn PDF document text
    • http://files.creativehealingart.com/uploads/1/3/1/4/131453081/busibesagogezalolavu.pdfIn PDF document text
    • http://zuvafib.germanchatterbox.com/uploads/1/3/1/3/131383841/vipozo.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/1/0431/4651/0493/files/pressure_die_casting_defects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/ramezowefepezatapopedevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7868/4573/files/kunemutibobutazujus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/15793325060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/66686695582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/acer_aspire_e15_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6232/1301/files/5972109072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/blackberry_passport_android_runtime_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/free_printable_double_bubble_map_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/posote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/pokemon_ruby_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/calendario_2018_excel_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000789f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789F 5392 bytes
SHA-256: e4deae13945f05a38acb0663d03528f44c7dea7fa437af4b8f8076a8e036023f
font_01_sfnt_off00008ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD4 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00009360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9360 9836 bytes
SHA-256: 3a25128c4ec0a01cc8bafc8fd7c70a1c2822583ab644edde0657310e140c1112

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