Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9275885e177771…

MALICIOUS

PDF

38.9 KB Created: 2020-10-03 18:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9cafba4d055b13609c1efb29b61daca3 SHA-1: fdff5ed9b5e120110d21e1e8ed652cb80deb2a5f SHA-256: 3d9275885e177771a00cfd3c458c3f4a24cf9a5711ad9e3913e17043863f74fb
184 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.
  • 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://ggtraff.ru/pify?keyword=concentrations+and+dilutions+worksheet+answers In PDF document text
    • http://files.prairiedogpottery.ca/uploads/1/3/2/6/132682076/80456802629f5.pdfIn PDF document text
    • http://jofamok.mammothsigns.co.uk/uploads/1/3/1/3/131380344/dimajomirexumozurog.pdfIn PDF document text
    • http://files.emeraldowlproductions.com/uploads/1/3/1/3/131383958/9512461.pdfIn PDF document text
    • http://files.gastragirl.com/uploads/1/3/0/8/130813325/33e070729.pdfIn PDF document text
    • https://site-1041288.mozfiles.com/files/1041288/33812102940.pdfIn PDF document text
    • https://site-1040681.mozfiles.com/files/1040681/64767048066.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/29bf7084-15a7-4244-a2c9-60dca64a196b/51301558397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a66e9f-51e7-4158-9b29-74ee25e0c1a1/roxadopesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286c4508-cfe8-4c01-b2ed-d648c274ee92/gobijuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/wabibadarekitekata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/panapebapoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7086/8644/files/sijodimol.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_off00005b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B84 5088 bytes
SHA-256: 3804c52425db0ba917358e35e313c01d179711c10cf1cbfd9ef7d7f7fcc8804d
font_01_sfnt_off00006cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 9968 bytes
SHA-256: 4259581c20de1a918453c4bcd83c1b4661257143d183f2e85dd513176373444d

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