Malicious PDF — malware analysis report

Static analysis result for SHA-256 230d6ce323d288a7…

MALICIOUS

PDF

32.7 KB Created: 2020-11-05 17:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6102a313289ded23e0a58bcfc6e86e00 SHA-1: 707c0f67d75188917a49010f8c3dc5c820fb6ec9 SHA-256: 230d6ce323d288a7f4b54e564ac3bc6e8058a8708b33f283eb3a6388dc651e41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a PDF link farm. One of the primary links, 'https://ggtraff.ru/123?keyword=brevig+mission+school+ak', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to manipulate search engine results or direct users to malicious content.

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/123?keyword=brevig+mission+school+ak In PDF document text
    • https://gadevonetikob.weebly.com/uploads/1/3/4/3/134358307/jarufuvowebe-wafajote-fanipuba-junopakituk.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/fb6e6300.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/balifaranoxi.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/gawivadifugapaneve.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/407a5a8e-21a2-4ea3-9c88-d2f42870ed4a/82500364874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1daac2-4cc8-43a9-8013-52496e70e3ab/guvolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5a8987-e80d-46eb-b0d6-b12700c9ff6d/wibusutojoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1020e8b-ac9d-4ff2-aec1-ab5999f24ee4/15133081509.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/vo5_hot_oil_treatment_on_beard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b71ce6-55c9-49be-a04e-7cdabb5b732b/rijutiwanaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5698/7799/files/votavebosidisik.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/93723316131.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/cl4940_phone_manual.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_off000041c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41C7 5388 bytes
SHA-256: bb59668003b986594cbbcdc4ee5f45fb50c8493d3d8a4a01ec9c99ee14ca59f6
font_01_sfnt_off000053fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53FD 10276 bytes
SHA-256: 770c2c006c790eb6bccf3d60171a414c6d164f81e6e894d3ae3bc46725795bb6

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