Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbd3080d1c3206b…

MALICIOUS

PDF

64.2 KB Created: 2020-10-12 09:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 086ba468caf362b671017867affd23e4 SHA-1: 47b574127b02388845958f95cb9b14a96cd70188 SHA-256: ccbd3080d1c3206b2d9f36065e532f687b6c00976bf7b7e69d66ac624376a950
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=benchtop+pro+scroll+saw+ss16 In PDF document text
    • http://files.okeedan.com/uploads/1/3/1/6/131606213/kojezekozamomu.pdfIn PDF document text
    • https://site-1039133.mozfiles.com/files/1039133/15781836629.pdfIn PDF document text
    • https://site-1043489.mozfiles.com/files/1043489/zufevutivegex.pdfIn PDF document text
    • https://site-1040514.mozfiles.com/files/1040514/texopobusubuf.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/64327903739.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/1/0486/0520/0549/files/pages_in_catching_fire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7214/7622/files/elize_du_toit_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/rogofugenepula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/49415721240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ec58f4-c235-4ca8-bb38-2e8158b4210d/fabisuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b998bb8-a16a-47d3-a798-d02271347d8d/58888689505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/320672c9-687d-4d6d-9a0e-f56639b7896d/dapiruronevibigogizijir.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_off0000b12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12C 5108 bytes
SHA-256: 60531400353fdbf72a78ed6e19ce6946f072d5348007f07d59b7016057882b22
font_01_sfnt_off0000c284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC284 10516 bytes
SHA-256: 166b7c797761152a7435e05f3fd2f305b73cfd12f07c32411d21a40c2f33dd8b
font_02_sfnt_off0000e628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE628 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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