Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6e4393d0e4fba7…

MALICIOUS

PDF

50.1 KB Created: 2020-10-29 23:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bec2abb16899d462056f1b302c831a16 SHA-1: 378508698652d685cb0d9760930a254a5331e46e SHA-256: bb6e4393d0e4fba705dffe4256de8d7c7a10467d68ccc0dae1791fd324e6d964
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggraff.ru, which is disguised as a trainer hero for 'Empires and Puzzles'. The document also functions as a link farm, pointing to numerous other PDFs, likely for SEO manipulation or to spread malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=empires+and+puzzles+4+star+trainer+hero In PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/fevebibanob-sixetasogivuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f8f8f14c534d.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/a4c5450d-8b9f-49ef-bcb0-6bbcd9749b14/rijonokuwidusojaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6cc7515-2758-4015-89f6-fc0c90c64e1e/desabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6f9783-2ce5-46bd-8310-613d04641664/rexilabeniwapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33abb829-e73f-4ca0-b383-d48ed9f5a1de/pozufoluwozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df9090f-4823-4bfd-a2c7-f5b13ea83993/93808155011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe5f07c-aef1-44f1-880a-d9694dfc07a0/yi_dash_cam_manual_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/rovatexogidiluribon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab7a0ec-14fd-4866-8041-cfef2d0d00e6/64941417940.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/vuvenosovogufaxujejutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ed606f-734c-46fc-8d97-73f695d18db2/wyse_cx0_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147c64f1-8bdf-45d8-9dd6-6cdf3efae655/31866532997.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651D 5296 bytes
SHA-256: 7b897620ab24402ed5184589ff72c440100a596ba8677ac59899ba77412de391
font_01_sfnt_off000076f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 1980 bytes
SHA-256: 03f018cc17829da883164f0e323b86bd9cd56ec9024e46620b1de42dedc6f1a5
font_02_sfnt_off00008049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8049 10968 bytes
SHA-256: 8267d7246feeb946bc7fcccc828a3c0cf62587f1e933265082ef1e1cb397db38
font_03_sfnt_off0000a5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CC 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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