Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b95e5ab967adc77…

MALICIOUS

PDF

68.4 KB Created: 2020-10-29 10:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e4c5bbc11957d74ae743a47d57a6da7 SHA-1: 1aa22712814297a588da3a1910b65359ec587c64 SHA-256: 1b95e5ab967adc77b9e1f27c2e83bb072c3118e87f3cae7d2e2192367747216e
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or scam attempt. The presence of a 'download button' lure further supports this. The embedded URL https://cctraff.ru/123?keyword=showbox+apk+music is identified as a malicious redirector, likely serving as the initial stage for a multi-stage attack. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://cctraff.ru/123?keyword=showbox+apk+music
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f99ea7e0c981.pdf
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8d16d4b57eb.pdf
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/vepofukejar.pdf
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/nibagubivotexo.pdf
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5f9343bc80b86.pdf
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f8b97c970243.pdf
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f9830f76959f.pdf
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/7c43be7fa5a6e.pdf
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/566d53236e96d4.pdf
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f899cded0db5.pdf
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/04bc41c5bd.pdf
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f98c9eb1b8ce.pdf
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f8ba5815294d.pdf
    • https://cdn-cms.f-static.net/uploads/4425235/normal_5f9a28149df1b.pdf
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5f94c65d6e977.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1f3e846d-223d-4f25-abc7-a9cb28a78701/samsung_ml_1670.pdf
    • https://uploads.strikinglycdn.com/files/b8ca3c24-5095-4e5d-a6a6-5d5873141936/tojuziwebagilimi.pdf
    • https://uploads.strikinglycdn.com/files/7c61a55f-5ff6-4fdc-9765-9cb8ad41f028/zixovo.pdf
    • https://uploads.strikinglycdn.com/files/2770bca7-23ba-46bd-84fc-4adea6e7d8bb/48981162042.pdf
    • https://uploads.strikinglycdn.com/files/52359c3e-e505-465a-bb33-c5f07722cf08/dibibexakik.pdf
    • https://uploads.strikinglycdn.com/files/00b5fdf9-8433-4686-813b-6444bf8c2140/mugen_all_characters.pdf
    • https://s3.amazonaws.com/biwuwukesazef/historia_del_bautismo_catolico.pdf
    • https://uploads.strikinglycdn.com/files/8bbe61b2-0e31-4db2-a4a6-c107628a396c/buratebexatiboxiroxa.pdf
    • https://s3.amazonaws.com/tadovu/nemixejuzekavifebilad.pdf
    • https://s3.amazonaws.com/bevekizadoxuj/48964946079.pdf
    • https://s3.amazonaws.com/tawosutosuxi/general_ability_test_year_7.pdf
    • https://uploads.strikinglycdn.com/files/e484a001-6c0a-42d0-b979-31f82884adb2/mozezojipa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c984.bin
9aa6daac08308b94a2928a6a6562fa940437289f6f090a39bb0a02d24ff03c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC984 5512 bytes
font_01_sfnt_off0000dc34.bin
eb0573395a55fbf4bf02416a34678f978a211bf755cea263e1d54769c74925ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 12648 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.