Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66fd271f6fcaa36…

MALICIOUS

PDF

34.9 KB Created: 2020-10-19 16:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: bb8e5ee614e539a5f2c0c55c0c5427dd SHA-1: bedc9cbce2213faa5f83ee1e8342e9b355b4ed2c SHA-256: b66fd271f6fcaa36b729ea74c8d7951562c21e3447ed0df10c5dc145c182911d
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/123?keyword=gang+beasts+apk+data In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f8ce78faf671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f87597f3dac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f8997e60ebda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8c8cb096ffc.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/4284028.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/sizupakifuv.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/besufazutidu-sorobexeben.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/penodiw-tiregolugu-vafas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f888969ec4ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8cc2d51e180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f875625f0544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f89eb3f27758.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/29512ae0-8f2f-43d9-b410-6a76ca9e2cf5/30433038272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25617574-1e86-477b-90aa-dc17fdabb2c1/podiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9aae01-20ce-4985-b3f0-792209d96c01/69202097425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e784cabb-c21e-4e62-8d44-60ddabbb7f64/fugumobuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/dedosidaxir.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_off00004bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFD 5232 bytes
SHA-256: a218e85df73a4475532132a4f81640573b0104dedec595a46fa71f6a47bf9559
font_01_sfnt_off00005ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 9600 bytes
SHA-256: 295c606cb610901a75ea7d592c903614f876eefe3eca6ee601055dfadca2749f