Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbdce65ef893c5b1…

MALICIOUS

PDF

46.8 KB Created: 2020-10-17 02:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 937e8ae0d79e28fcee16b6c3e247a07f SHA-1: 3dad12d4bf2d2f9a6968e64596e4f2e1d88e3926 SHA-256: cbdce65ef893c5b1ce74b046c223aa0927789707342e80f80e94e68e303d2e6e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links pointing to various external websites, many of which are hosted on disposable domains. The primary link directs to 'ggtraff.ru', a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for SEO manipulation or to distribute further malicious content.

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 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.
  • 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.
  • 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=minecraft+bedrock+1.13+beta+apk In PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/laguxek_pugefewemil.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/3473017.pdfIn PDF document text
    • https://dumejolizaxoko.weebly.com/uploads/1/3/0/8/130814858/kenogene_duzasibug_rotalarux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f89e2efa23f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f8a0b24e00c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f870f015d95b.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/mitefegezevuzesadil.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/5755721.pdfIn PDF document text
    • https://moxoviwepikiwu.weebly.com/uploads/1/3/2/8/132814726/powiti-lotiviv-zureve-rononil.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/wemovoxorim-jukekese-xofekewuzozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f899c19bb1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8a0c9cd1bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8a267d289ee.pdfIn PDF document text
    • https://kanudepu.weebly.com/uploads/1/3/2/7/132740929/3ca76ed079.pdfIn PDF document text
    • https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/2795003.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/sabuti-wixubigalo.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/xazuzulisemunuxu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.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://cdn.shopify.com/s/files/1/0429/0609/1673/files/levels_of_explanation_definition_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1580/5349/files/zemiruzoxepinoxoronow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/77978772738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8546/6267/files/psychology_chapter_7_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3074/8824/files/kufutujigupu.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_off00006b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 5184 bytes
SHA-256: ee59c9a5b8658fc54a88f5dfb5b278c1e9466b8dc964d1b9711eec5b6393aaf6
font_01_sfnt_off00007cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 10072 bytes
SHA-256: 84563cb0567bc1ed60967217c17315dccd17d9ea1c432d21b833c66826a38ad3
font_02_sfnt_off00009f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F50 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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