Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddffae4a44698b6…

MALICIOUS

PDF

43.6 KB Created: 2020-11-04 03:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 91297bb3ce673f594581d98acfd0e047 SHA-1: 984e648d1c830ef50b9911c9300d390dc839a732 SHA-256: bddffae4a44698b6e31102d5f4e136700adc4df48ed3a0ed58280ea628a5850c
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://ggtraff.ru/123?keyword=serenade+fungicide+lowe+s In PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/504991.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/237a77aa-4475-4e58-845b-24e9e5b37b1f/71820112735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3531b40b-6fa1-4e7d-baaa-be287786b937/47361946387.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/tratamiento_absceso_cerebral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3c2ecb-202d-4957-adb1-14fa3f1f3064/vudubapapugikatawopog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2124/0986/files/fiche_de_rvision_brevet_svt_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa6821e-17a0-45b9-b550-6d009b30c9ac/46298369294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103ce19d-caeb-4a7e-b420-c44aefb4f526/71548241595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/rizebunokitalinejagazupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215d989b-e941-462d-8f56-fa14a046c524/81598181336.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/wonelivodedotabitegab.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_off00006ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 5384 bytes
SHA-256: f501f3a021a3b56f7963cdc0145c73b0b9763f331e6fe1ced7ef72c7cd499a4e
font_01_sfnt_off00007d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10684 bytes
SHA-256: 766f3b892f579390cdfc955591dedeacb4709418ffea961e559d48018d256702