Malicious PDF — malware analysis report

Static analysis result for SHA-256 6403c20d040c5a3e…

MALICIOUS

PDF

46.3 KB Created: 2020-10-14 18:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0bb7adf16fd76a685455d455ebf00537 SHA-1: e47b718a91f706fdbc13d466b4c946686b40da86 SHA-256: 6403c20d040c5a3e54b27c87bed083ff432c07d9f0763bf293275e28c7b9f5fb
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.club/pify?keyword=nxt+robot+arm+building+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f86f99f5f9e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f86f8790c002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f86fd91e5ede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8703160619b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f870f1a5e0ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f870a436aa34.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.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/1/0440/9910/9016/files/2056874157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/mavox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4519/3381/files/gonibulenumumulepupokeset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd268bab-9698-45ae-bfcb-6680158ec8ea/tomobirimewavinujakufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97530946-7615-422c-ad2a-7f901a63e1ec/nawul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1668692f-e312-43dd-a19d-96dc5a0c6584/97219112046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e0a79a-13ab-45cb-aff8-994dfb067633/ximajazuzodimisimewof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8516b1c4-4abf-4e51-b4a8-0bf71c968811/18994524164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410cef22-218d-4f1d-8401-3d8c05ade473/40779797541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16085a2c-e6b8-498e-82b2-e225a75fcf3a/24244878330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1807950-9ce4-4e67-8626-dec2317b8d52/12036795709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4de66f-256e-4428-8bc4-bb33388fa15d/gozenesikepapepotefik.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_off00006653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 5200 bytes
SHA-256: 1db9f4e1568dbecdbe11347fbfaf5c8af43ab5f27d029434a6a756a07e8168df
font_01_sfnt_off000077e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 10704 bytes
SHA-256: e5d4f16de1dba899acfed675beb80cc8d6d8dd6fb96b774b97c9ed3993e32e21
font_02_sfnt_off00009c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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