Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa72b1cb2d584d73…

MALICIOUS

PDF

41.3 KB Created: 2020-10-30 11:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 40c374f7c906932f7a9234590bb12b80 SHA-1: da832de8fb18c88cf2f32c24224f142258c227c2 SHA-256: aa72b1cb2d584d73ee4ddceda38d6553674dc4f22ea63b9ef284b1e4c783fe07
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.me/123?keyword=virginia+studies+jeopardy+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f99ee94846f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f8bd45bac97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5f8ab317cc250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f90b613c6727.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xeniwuka_mafevolozediz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f884f3206b73.pdfIn PDF document text
    • https://falogumirej.weebly.com/uploads/1/3/4/3/134368081/3017769.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/fozukowidudi-wijiduzi-fuvepup.pdfIn PDF document text
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/aa71b0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f9b9ede95bb6.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/dikonuvuzafuko.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000061be.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000061be.bin)
    • https://uploads.strikinglycdn.com/files/50e29632-9990-484f-9f52-31c2b9b3c6ec/11988662309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5801/0529/files/surviving_high_school_apk_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9635/8044/files/splash_screen_in_android_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac7341f-0b0d-4b68-b11a-a1ad3a6974bc/99245793724.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_off000061be.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BE 5388 bytes
SHA-256: d2cb0a5f6dd76600e84b420aabb82fd277964cd5d242706af448f591c21239bc
font_01_sfnt_off00007412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 10664 bytes
SHA-256: c4a4725f1314415eda3d21ff5689feb0964875de683e3ba3ff6da6df2a3cd012

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