Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b2351a5f970f3d…

MALICIOUS

PDF

72.5 KB Created: 2020-11-17 07:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c9fe74b27b4ce123a078512e8236274d SHA-1: 36f77263f30bfe4cba9328475cf182b29404c705 SHA-256: 21b2351a5f970f3d7684fcc00795c6d35c9bfc604acf4088278100ee9031f766
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely used to host or redirect to malware. The document body, though heavily obfuscated, contains text related to 'warframe blueprints', suggesting a lure to entice users to click the malicious link. The presence of numerous PDF links further indicates a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=how+to+get+warframe+blueprints In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f947302b22c7.pdfIn PDF document text
    • https://latebutaweba.weebly.com/uploads/1/3/4/3/134315799/bawitifaxamixojumeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8729cce565f.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/fejilar-gomijigujoxa.pdfIn PDF document text
    • https://sawuraba.weebly.com/uploads/1/3/4/7/134720576/9ae2ec2a33790.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xoxaneral/defovuputefokatetoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddafcb41-6be3-4f98-b565-ff2c9d78fe3b/fomotufubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc4558e-36d8-4ec3-b971-0ba73163b0b7/diana_dill_plastic_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/19924060786.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/wokajajan.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/radov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3537e25a-d4ee-440e-b4d7-9cb7400345ee/52225640192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747020aa-4669-43ea-89a4-7a5ac446222d/girovuzotejuluposewati.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/adeptus_mechanicus_army_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5D 5296 bytes
SHA-256: a92f459ef659a8dc976a727389055096b54a8668ca9fc55c708e48d3dc9f204b
font_01_sfnt_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 10932 bytes
SHA-256: b92ad71ef01106b33a44308f59b67951a7217259b6c4b71359661c7645d192b0
font_02_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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