Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dea751a696cd3e…

MALICIOUS

PDF

31.6 KB Created: 2020-10-08 20:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c4c6e7874ae6426feddb7ee009c1d24f SHA-1: e63c3038c9ca5cea7c30239ca35f9338fdaf1ef0 SHA-256: e4dea751a696cd3e413ebce37af5a7b6304c7de5e6ca828945a61466beb012c3
144 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 31 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=s7+200+manual In PDF document text
    • https://site-1040322.mozfiles.com/files/1040322/pesupixunabipunibexal.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/89226150048.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/79178403888.pdfIn PDF document text
    • https://site-1039745.mozfiles.com/files/1039745/21158873895.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/waziparuxawezaxuk.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/kimum.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/21332536513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5639/3123/files/a_particular_brand_of_dishwasher_soap_is_sold_in_three_sizes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9465/3595/files/fogaxaminebezake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/guerra_de_los_pasteles_fecha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/83196826534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1526/1338/files/supevofarajeluzodemogoxoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7c601a-3db9-4633-bd5c-3091dee0526e/42851959964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24af34dc-1267-4a72-8908-f2d6e4eaedf7/nazukukiwopejefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187c9dee-d461-41c3-a8f2-ef52a4f168a6/julezuviwaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3f674b-2452-46cf-90e9-f5bd9c3876a0/67213687183.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_off0000473e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x473E 5016 bytes
SHA-256: 0c48a175fcf90679671468c7680536102988effd6cd15c2b86ebc466256ed5bb
font_01_sfnt_off00005843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5843 7672 bytes
SHA-256: 3cdf50c9a95e0ee007d864af664ead957c3b5962026e0872941ed4b5c4730270

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