Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9172a1fcffbadc…

MALICIOUS

PDF

49.5 KB Created: 2020-10-10 16:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5a16f79ab799adea755b04239d5cff36 SHA-1: ef35622a62dbfab5bf58877fd36507f8dfbb3fed SHA-256: 5c9172a1fcffbadc90398dd3f0e7181b207440dca519db15ed2db4b475183b7d
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.link/pify?keyword=pathei+mathos+meaning In PDF document text
    • http://files.gentlemamaholisticmidwifery.com/uploads/1/3/2/6/132696598/vabuvopezined.pdfIn PDF document text
    • http://files.insulatedbulkheadsandcurtains.com/uploads/1/3/1/6/131636642/5454362.pdfIn PDF document text
    • http://files.coachandcrewshow.com/uploads/1/3/1/4/131437834/poxizugenobesubuf.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/df38c1b0-0ce1-486f-a697-b460af13c154/tefokupugigumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f319efb-e1eb-43c0-8bac-a54ce1fcfb26/madawinifam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f8e5d9-815c-43b8-94ed-44d9a71ba971/fevoxiwukevezotavixubuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a766f450-9494-4ad2-90e4-bff62a38bfd2/xivamik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/zixewuritaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8982/5443/files/cosplaysky_darth_revan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aadb414-0810-4fe1-9a49-26451beedb04/puwejib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fdca43-e809-41c7-896f-fa5fc4d43c07/18970841696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29eee07-fd49-4000-b200-5c4df7c66698/29581776197.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_off00007329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7329 4972 bytes
SHA-256: babed84e4f90b2d435f7a2f1aea34c1b0d39872e7901b3c4a006baea6a5d07d8
font_01_sfnt_off000083f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 20500 bytes
SHA-256: 036a57dbad5f2b4a08477de95504d133e8355df6d7d92ccd6e644f2c4cf426e6