Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f143bf08896b2c…

MALICIOUS

PDF

54.7 KB Created: 2020-08-05 02:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2f340a8537e8602a5a6c8fe8e404748c SHA-1: 9c176c72db38e1c37c73e8248bec2f96b96c5ac1 SHA-256: 84f143bf08896b2ce67a402d1c7d9d68d61be9cef1492146658f2e8e58fb616b
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=between+shades+of+gray+pdf+espa%25C3%25B1ol In PDF document text
    • http://lalebikog.healthymindbodyandsoul.co.uk/uploads/1/3/1/8/131856725/simip.pdfIn PDF document text
    • http://files.alanhockett.co.uk/uploads/1/3/1/8/131871919/siwuwafivumiridot.pdfIn PDF document text
    • http://files.light-sup.com/uploads/1/3/2/6/132681002/lolonegesositub.pdfIn PDF document text
    • http://files.atouchofclaas.net/uploads/1/3/1/8/131871849/f40894.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/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/sotisepuzujenutiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/92957628700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/66270621725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/68271138881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/jiwapovezafesaxuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/30969168104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/wowakinokam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/32653714457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/anthropological_research_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/hp_universal_print_driver_pcl5.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_off000088fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FA 5760 bytes
SHA-256: 6ed6750391a6cfe7d9f9fa6a624323ec342c0db54aca834a693623a04dab3ee8
font_01_sfnt_off00009c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6F 15800 bytes
SHA-256: e558a2bc13ea78b39fcc871876640a43f0859e78690895a093d88286672167e0

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