Malicious PDF — malware analysis report

Static analysis result for SHA-256 04796012ec1046bd…

MALICIOUS

PDF

46.0 KB Created: 2020-10-31 01:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: bb07541de85af3735b8f899ceef88aee SHA-1: a4a8113d5c28a287a56f52fb6f4132d9aeda4688 SHA-256: 04796012ec1046bd3bd4dadf9dfbd036fb9153d60f241e1f532a60483cd454e8
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.me/123?keyword=munchkin+marvel+how+to+play In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f8ca21d2c93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8d656f3ad1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8633/1038/files/73591370408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acc0c9f-3451-43cd-928e-f8818d0ca7d3/wutatowimezipufowizetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59d35f8-ef23-41e7-ab24-8f00d6a43cd2/96512172058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6997/4949/files/85542757188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7195/5878/files/dehumidifying_egg_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8675/7018/files/fedidizajopizasiziburibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0384/4002/files/70415876332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275dbb7e-785f-45eb-b12d-17e89d020634/davumewuzemipun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 5200 bytes
SHA-256: f18698718b16115be0bc33a0ab169c99d03395ce583e3fb4bf79699330f1e1ab
font_01_sfnt_off0000773f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 11052 bytes
SHA-256: b50ca09a8f0964dbaeb4e160ddabb85cbccf45b3ab00726c87ab424c0cc82e5e
font_02_sfnt_off00009cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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