Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c42cd3c566c00f9…

MALICIOUS

PDF

43.3 KB Created: 2020-10-05 02:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3b1811db608083032daaff54a38c386c SHA-1: ff53de50d7509b023f3b5574a4c69da2e5ee4938 SHA-256: 1c42cd3c566c00f92b386a1bdaad344a3578dd3df268bdbd90a887459efc8d98
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://gettraff.ru/pify?keyword=food+inc+movie+sheet+answers+fast+food+to+all+food In PDF document text
    • http://files.fmtiinc.org/uploads/1/3/1/0/131070442/ganetut.pdfIn PDF document text
    • http://files.hammeredbyhandpikeplacemarket.com/uploads/1/3/0/7/130775845/xuzamo-kigivekavaxu-vobanane.pdfIn PDF document text
    • http://files.apple-itchyfeet.com/uploads/1/3/0/7/130776061/risujom.pdfIn PDF document text
    • http://files.apolloartdocent.com/uploads/1/3/1/4/131453540/boxapunamuvuro_repoduseviv.pdfIn PDF document text
    • http://sumuw.magicmediabox.com/uploads/1/3/2/6/132683071/4045952.pdfIn PDF document text
    • http://files.dirkawalker.com/uploads/1/3/2/7/132741110/2582194.pdfIn PDF document text
    • http://files.freakwater.net/uploads/1/3/2/7/132740186/jebamiwe.pdfIn PDF document text
    • http://gimidugin.awaws.org/uploads/1/3/1/4/131406861/xelex_xanazuxum.pdfIn PDF document text
    • http://jaxulon.buildvaluehere.com/uploads/1/3/1/8/131856166/c7084b.pdfIn PDF document text
    • http://files.thestrongestfish.co.uk/uploads/1/3/1/4/131407235/zuberemapifel.pdfIn PDF document text
    • http://zejob.utahversatility.com/uploads/1/3/1/4/131438583/bujusetumo.pdfIn PDF document text
    • http://files.jrosetextilearts.com/uploads/1/3/2/8/132814972/xalevuwanu-zejopusujadika.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/1/0432/0634/4868/files/90223005079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/43725291900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5372/5334/files/cream_legbar_chickens_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0070/7488/files/wendys_ingredients_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8124/4058/files/tideru.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_off000069d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D0 5368 bytes
SHA-256: c7a4af4c6484fc1f42a111855c6bd989dffd0fb5ea76d8552e133f7914edbadb
font_01_sfnt_off00007c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C00 10544 bytes
SHA-256: 22534c394872536dc750e4df9aa7d86e27816ad8df56e1b2966deb169cb5b600

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