Malicious PDF — malware analysis report

Static analysis result for SHA-256 59104086fa0f17d5…

MALICIOUS

PDF

51.3 KB Created: 2020-08-27 19:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ba69f7d31c7f85c1f70aead1d80ba8e5 SHA-1: 72f43c38d836064cbae4486b5513b7225218449e SHA-256: 59104086fa0f17d5c189eba97a093a45fd4d839cf0fad6f42dd12d9fe45a65a5
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=toshiba+protege+z835 In PDF document text
    • http://pupefinax.robynpforrryan.com/uploads/1/3/2/6/132696063/pegekepogon.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/1/0428/0100/4707/files/wened.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/advanced_bash_shell_scripting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6848/4758/files/estrategias_de_afrontamiento_al_estres.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/interpreting_slope_and_y-_intercept_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/boogiepop_and_others.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/73910714351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/85964969696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4421/files/paediatric_hypertension_guidelines_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/38862054587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/python_logging_syslog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0910/4279/files/jibavixijafupomuwigipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/dedob.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_off000084cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 5668 bytes
SHA-256: 01ccf1fe7c6d5e628bd01660cd6f7b9502e8c7a22e29f3bddc720469a10c7626
font_01_sfnt_off0000981c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981C 12444 bytes
SHA-256: 4ca212b2b6fecfe708acfd1ef767fbad046ac0f4468035fb8e1a59fd20a8e154