Malicious PDF — malware analysis report

Static analysis result for SHA-256 180bd53bcc314d77…

MALICIOUS

PDF

36.9 KB Created: 2020-08-09 17:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ad85f31d4c2139e8645d25d9f75177d2 SHA-1: fe0c90d572f3378992932c2670ad28fce0ba9b86 SHA-256: 180bd53bcc314d77303b4fe2bedf7f4602329809eed489da011f789e8a545a8a
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=biosystematics+book+pdf In PDF document text
    • http://files.daragraphic.com/uploads/1/3/1/3/131379696/nudux.pdfIn PDF document text
    • http://modovep.advancedequinesaddlefit.com/uploads/1/3/0/8/130874197/tesemedede.pdfIn PDF document text
    • http://files.2ndchancebailllc.com/uploads/1/3/0/8/130813413/c40a3f0.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/1/0433/0687/7080/files/7236632937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/morokitufofanafitoburax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9078/7996/files/perspectiva_caballera_e_isometrica_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/30551339290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8126/0438/files/domaine_de_dfinition_d_une_fonction_racine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/99346245097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/kimetolusoneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/dafosuzifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9037/8909/files/6381158100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/27960006083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/6267348875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/variance_of_binomial_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/que_es_la_ostomia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/vuxujesuzemumojawe.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_off00004f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F74 5528 bytes
SHA-256: 010b1ea2a2e6377b8f3bb22230489f089cb12a967be1042f5dc109b9e1b9eb23
font_01_sfnt_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 10444 bytes
SHA-256: 8be388d709bb220ae1d5f22f4f1c2fc61f923a91d9a247614887f750038cb4ff

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