Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6606f1cb8aa25a…

MALICIOUS

PDF

74.1 KB Created: 2020-10-26 22:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ad61fa15e069c628c5ebd2f85585247c SHA-1: 763846950e465bc6ffd176cc25172c5cabb7cb65 SHA-256: ad6606f1cb8aa25ae08869b151e66232b6caa045c45378b08f6092c551a72451
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to S3 buckets, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/123?keyword=barbara+jean+blank+husband. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful sites.

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.ru/123?keyword=barbara+jean+blank+husband In PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/2a457a2845966.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/6dd5746e6360c44.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/medesora.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/vokepilewobe.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetazino/41112144638.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/avadhuta_gita_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/wazifepiwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/comment_fusionner_plusieurs_avec_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/medical_fitness_certificate_for_job.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/athanasius_writings.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/caballo_de_troya_2_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bach_cello_suites_barenreiter.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/canon_eos_7d_mark_ii_manual_dansk.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/lefokutirukalaf.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/pantangi_o_pambalana_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/98139359525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b899e6-4d46-4a67-a7e8-e17868e6b43a/mukiwowavofovevep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5da8c8c-1928-4fe2-a89f-c61495886c9a/44122321838.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000c54d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC54D 18104 bytes
SHA-256: e4a1de1c02f1ec3bbe2e98f0652ecf05c505ac928fd2a7ade56a342c753a0e1a
font_00_sfnt_off0000b396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB396 5240 bytes
SHA-256: 8c276845641d3dfcbebff5bd24594e08ae3cd371655c895c9f27cfeb81ce8151
font_02_sfnt_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 11208 bytes
SHA-256: cd93766cf2e25cf1eec1a2583e82173952509886705f5293b9b4b89c1a58ac89

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