Malicious PDF — malware analysis report

Static analysis result for SHA-256 be869a543f7b8736…

MALICIOUS

PDF

39.2 KB Created: 2020-10-30 22:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 12abff054533602fbd3d1200323be63a SHA-1: de9a1d938cd11d83802dea8eb5978df7e0a6f478 SHA-256: be869a543f7b873665e394381785f24fbb36b74936250e0aa3afba89002d758c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gopro+hero+manual+update In PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/sazodelami.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/zidilud_dogitozejawo_vigematerajope_rulovibudojes.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/a51fa2982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f9975bbcaf8f.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/pelubevesitu-wuvoli.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/2023548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_5f9556709f6ce.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/mowasafiv-xezuvazirawidu.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/bitivomu.pdfIn PDF document text
    • https://mupawume.weebly.com/uploads/1/3/4/3/134365579/wokofufas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/lagasikido.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/100_squat_challenge.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/dogswell_happy_hips_recall_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072c7edb-5204-4306-8b8f-b9190b504018/88011817236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306ca04c-597f-4ad1-a7a0-32db6612fa82/x-men_apocalypse_dublado_online_gratis.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_off00005b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 5052 bytes
SHA-256: 8e724af532880c16bf043e198ec6e09b7e560d159bc0ad793ad32a5fd4a7ebff
font_01_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 10388 bytes
SHA-256: 81622faca1a487fde599c119cbb94c9ad25b2ed308a204cd0818101eaafa904c