Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcf825dcae7f2f6…

MALICIOUS

PDF

41.4 KB Created: 2020-10-29 20:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 575100a16a090beb9399ecd9207b4bf0 SHA-1: c8b49369d3934857f72ee807054804bc88e33319 SHA-256: adcf825dcae7f2f6ddc46f1f85c8e950ca25c31c11b35ba4f60ea0a331a2dd66
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://ttraff.link/123?keyword=critical+hit+generator In PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/4857655.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/c4ab7399f534.pdfIn PDF document text
    • https://lopinelu.weebly.com/uploads/1/3/4/3/134369173/xegowutufowul-zonizimito.pdfIn PDF document text
    • https://lujadogube.weebly.com/uploads/1/3/4/5/134522393/nulopuvosisosegere.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/7166765.pdfIn PDF document text
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/juratanokikedavume.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/3ace25.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000642c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000642c.bin)
    • https://cdn.shopify.com/s/files/1/0503/2738/8356/files/team_awesome_mod_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065bb090-68f8-4681-86f2-fe3165f92875/ketafojavosubedoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/acing_the_new_sat_math.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/how_many_feet_is_20_fathoms.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/pdf_file_format_definition.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 extracted file (font_00_sfnt_off0000642c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 4788 bytes
SHA-256: f9a0c76cb77bd915a28282fa8bb07baff4485c3b5c6b9019a747802874fd9294
font_01_sfnt_off00007468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 10916 bytes
SHA-256: b2c70aae7f637c4fcff0295a113d6496a501f16b23f6a953ed4b61503b203111