Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b1bc5437ce723c…

MALICIOUS

PDF

51.0 KB Created: 2020-10-25 19:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: e0730afb927a5a5e8328f151f461cab6 SHA-1: 267b703d5e234baee0fd12b9b55d3e24cd35f321 SHA-256: f0b1bc5437ce723cab3e3003b574152a2aeabb1720ffd93ec524b03972bf7dd0
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as part of a link farm designed for SEO manipulation. One critical finding is a direct link to known malicious redirector infrastructure, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains the target search query and several of the extracted URLs, reinforcing the lure.

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://ttraff.me/123?keyword=tensor+methods+for+quantum+chemistry+books+pdf In PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/060bbe2c2d.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/piworaxamotela-rukalutitoko.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/816319e893468.pdfIn PDF document text
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/6536785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f87de2cbd006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_5f8d7e2bd38cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f87a798c8b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f87818962bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_5f925308de1e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f92c235b8bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f957a76d5330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8a710c543e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f89f0e2101d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f87391ef26f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/joterige/convert_byte_string_to_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/30931056608.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/99167741320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd5f22b-6254-4f25-bf5f-1653dea101f2/palubutekojawewonoruwile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9094132-4894-4953-9e09-1f8c9a4660aa/15746552671.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/primary_school_admission_form_format.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/94051160356.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/werukilisomakuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/22542770749.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/20124434527.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_off000087ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 5744 bytes
SHA-256: 1cfe6b94b084522d5d865ea1f2b8c7ed844150bc5ee612333df0d29c99073ac9
font_01_sfnt_off00009b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1E 10144 bytes
SHA-256: 2f708e2bd4bcda2adf385c78674268c7d86c8a1d719c5f67200e1506b762dbb2

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