Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d2f3f9cb9887a9…

MALICIOUS

PDF

34.3 KB Created: 2020-11-01 09:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: f27dc49071e8d1d7664d9527973494af SHA-1: 8afbcf4fcf056cd4026dbfc340ed9c1e0075e30a SHA-256: 43d2f3f9cb9887a947dd44e13009b89fc304f7868fb71fe98c0869cf20e0af44
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=bissell+powerforce+helix+filter+replacement In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5f8b22ea2f4a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f87b585325f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f96ea376c43e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_5f9a1dea6adc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f9be044b42a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_5f9d83f781b60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f8d545eb81ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f941bb0c2ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8b3b12c8294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f8e8c52c47be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5f9e30fee1f81.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/wajufifenoxuj/ntn_pillow_block_bearing_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/gixejanuwega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93584501-bc22-4d2a-9254-77609e80e7b2/98120712363.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_off00004691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4691 5464 bytes
SHA-256: 56c7578d32e88753f1f3f0c7c6b4d007b9c5bacf9eed2ae8add858761026a702
font_01_sfnt_off0000591a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591A 10232 bytes
SHA-256: bd2ca9fb90741d426796e0a624ee9bd3b714aa8f880cd8f4ec2efff07565f4a9