Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c6660a78563469…

MALICIOUS

PDF

52.0 KB Created: 2020-08-20 14:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ed4f64e773478ea7f6bd91a0043d9d76 SHA-1: 2324418fe02cbbf624e7107f9aba7af265aa550b SHA-256: 05c6660a78563469d3a01415e527ba20998e7f6abe8e7db094fb8450bf6c81d1
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.ru/pify?keyword=fedex+international+waybill+form+printable In PDF document text
    • http://files.uglypixelicious.com/uploads/1/3/1/1/131163540/8113458.pdfIn PDF document text
    • http://files.harthillhospitality.com/uploads/1/3/1/4/131406735/1380075.pdfIn PDF document text
    • http://jewozu.johb.org/uploads/1/3/1/3/131383544/farode.pdfIn PDF document text
    • http://luvadi.gimmethelodown.com/uploads/1/3/1/4/131438044/dipaxawazonol.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/1/0430/2218/8701/files/66361818051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/50803750309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/36046165485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/altium_designer_tutorial_step_by_step.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24221046066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/steven_universe_torrents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2658/0375/files/wepedisomelotumojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/1460/7263/files/vector_of_strings_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/99641963240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4066/0895/files/cardiopulmonary_physical_therapy_book.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_off00008cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD3 5364 bytes
SHA-256: 6ee80073f7b8c4c0de1898ac3506ade5771708af7f1ad64926e439afaef6a626
font_01_sfnt_off00009f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F19 10412 bytes
SHA-256: 91965030bbe8b7c2146e2f004f2be949671c438466eca98c460e881f79ff9743

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