Malicious PDF — malware analysis report

Static analysis result for SHA-256 735c73b72a53da81…

MALICIOUS

PDF

46.8 KB Created: 2020-10-31 05:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7ec29cd8f5bfa70cf96f9573b1ac947b SHA-1: 8d0ec76b9230b1fc8d96ff6050e2bed128478881 SHA-256: 735c73b72a53da813bf7d2e189dd402ecb5cb1df2c770b55293f3c6985d6f981
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.me/123?keyword=pink+aura+meaning+spiritual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5f9ca6074609b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f98e94e8c0a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4883ad92-7741-4836-90c9-48891c94ecc2/9182378862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0509/3461/2128/files/alachua_county_school_district_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3df2f8-543a-4d0d-b444-a38092f9d8d1/nibebawajezomawitorazem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2841/files/arnold_schwarzenegger_soundboard_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11e730a-4a94-4149-ba56-d7f1e2a33a94/43598881354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0449/4500/files/17158579680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2907/2552/files/16839999817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bedef9-c90d-4b32-b49d-9ba51ffcd01a/bimaluzuzuxedawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4751f0f3-b9a7-453e-8f3e-94dd2f7cb2f4/nefuxukur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7dac63-46b7-45df-93d8-5756768d3ab4/lisawan.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_off000078c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C6 5204 bytes
SHA-256: 69c97833b4e4f285776c22c34b35ed72470bcb622cd942b1e03935d0aa848703
font_01_sfnt_off00008a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6C 10544 bytes
SHA-256: 69a9202f84b28d7be3e714841eba8dc2c2c659f3af725be21ff6022b316aea41