Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47c85874dd82aeb…

MALICIOUS

PDF

58.6 KB Created: 2020-10-16 08:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f87f16fd134109c3351730abf132b28f SHA-1: 71b476c2eb80fcff2807d476f45607c55a6d68af SHA-256: a47c85874dd82aebc9c9018f6470e58949c56701950e22cede83f73cb707e4a4
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/123?keyword=corporate+governance+and+ethics+book+pdf In PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/ronununase.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/8513029.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/4140341.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/regabosi.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/9956862.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/9807867.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/724140.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/c36df7ab1db.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/dogire-zolutovokusigi-zogutired.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/guwonajikawow-tededireri.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/2585027.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/vowuwujodelevure.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/mewonolosa.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/1/0266/9032/2630/files/31196882754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2364/8936/files/first_order_zero_order_second_order.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/3560141051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5157/3144/files/40560244713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/botetugupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9754/2822/files/11589896307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5772/0729/files/male_model_hashtags_to_get_noticed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8442/6663/files/22909268955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/milk_of_human_kindness.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_off0000a7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E9 5552 bytes
SHA-256: 87d3c983387678f5013bbdb567f03cc5f6af32f6fdf3c0bf70ef28c5eb3d512b
font_01_sfnt_off0000bac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC5 9844 bytes
SHA-256: e7e50366a30e07df9f50fef2ac60d7d3fda61f482153f9d581292284d8aeacfa