Malicious PDF — malware analysis report

Static analysis result for SHA-256 61db1458179d2057…

MALICIOUS

PDF

40.5 KB Created: 2020-11-02 22:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e29bd04a996749b48ebee0cc6831adf6 SHA-1: 0215f6960b62ab0cea5bda9560afcd99bc9c5216 SHA-256: 61db1458179d20577fff1700f621635cc1cdbd2f304abdca39774ba3375980e9
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=roof+repairs+melbourne+fl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f911d824b793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_5f9d2f32a9be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f9771553ffa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f8d44b9cb58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f91d84076eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5f94a4646c343.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/f77bd684ca1de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5f94d397e2bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f913f55d99c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5f8bfe5b24a3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/pdf_bestanden_samenvoegen_word.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/cfa_level_1_2020_curriculum.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_off00005e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 5196 bytes
SHA-256: 79a3f426fa390244be40bfa04020a7ea029ecf9fb2e0de113e599034ff4d2643
font_01_sfnt_off00006fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC2 11204 bytes
SHA-256: a82afdcd25666b9e26fb242c7a9b4a734ee0fb7bcff9b6d8f27aa804fd5b33f4