Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9691035d2f9ee83…

MALICIOUS

PDF

46.2 KB Created: 2020-10-03 21:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2a225d63bff132676f6d1adcb1ac5209 SHA-1: a79f0da59e1bd5801a97240515774625e07e06ae SHA-256: a9691035d2f9ee830c5f01bd1755a171326c82146ad3e5d6648264f702f24485
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=ed+fong+antenna+installation In PDF document text
    • http://pubimig.pop-wuj.org/uploads/1/3/1/4/131406226/lozaminof.pdfIn PDF document text
    • http://files.pinvestgroup.com/uploads/1/3/2/7/132712235/3135848.pdfIn PDF document text
    • http://fawivizuf.sdadata.org/uploads/1/3/2/6/132682347/mavebexinised.pdfIn PDF document text
    • http://lomilorog.julianamadzia.com/uploads/1/3/1/6/131637136/soposajataxupinifoti.pdfIn PDF document text
    • http://tizige.choengmongardens.com/uploads/1/3/1/4/131406710/kasaforaw.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/1/0482/0513/6024/files/grim_dawn_conjurer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/45310235578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3114/8197/files/segosav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/jifudizum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1983/1962/files/30104608905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db7e1ee-6828-4d92-b173-6a3337adb1f6/67591081185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e9cee7-ee73-4642-b1f7-a14688a6328c/todukelifozavivuripe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97eea81b-04f5-4269-8330-6c52e2ff55de/rumipu.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_off00007759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 4936 bytes
SHA-256: a02c8a4038060c98a42ed2a6b7f0ac6974adb0d167289d40bea01ea87b69d1ea
font_01_sfnt_off00008840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8840 10572 bytes
SHA-256: bd2e796be894fd103ff9bf4e2accfcc4237fd9c50046d92d039d4b016a542728