Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c00d6bd874e47d…

MALICIOUS

PDF

33.7 KB Created: 2020-10-10 22:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ef302a0756f89801798b752dd90bfc67 SHA-1: 989c7adf7abb5cd25a50ff5830ee6f1babe6172e SHA-256: 70c00d6bd874e47d0c24deab9855aa81f94c533f7cbf6da8424492737de3f1e4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on disposable domains, indicating a link farm or SEO manipulation scheme. One URL, 'https://ttraff.link/pify?keyword=come+thou+fount+jadon+lavik+chords', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.link/pify?keyword=come+thou+fount+jadon+lavik+chords In PDF document text
    • http://dibaf.7220mercantile.com/uploads/1/3/1/4/131453133/fawadan.pdfIn PDF document text
    • http://files.thetrashtalkblog.com/uploads/1/3/1/4/131438532/260a7f.pdfIn PDF document text
    • http://sakuwimoj.islandmaidhawaii.com/uploads/1/3/1/6/131607163/5880016.pdfIn PDF document text
    • http://riverof.inapawine.com/uploads/1/3/1/0/131070374/busoze_vibovimuluwap_wufuxok.pdfIn PDF document text
    • http://files.saugushighschoollearningcommons.org/uploads/1/3/2/7/132740277/bovud.pdfIn PDF document text
    • http://files.eeteepees.com/uploads/1/3/1/8/131858044/f60b51.pdfIn PDF document text
    • http://files.suzannesesthetics.com/uploads/1/3/0/8/130873708/4f8bee.pdfIn PDF document text
    • http://wopuvax.ks-image.com/uploads/1/3/1/6/131606227/xaditefe-dobugi.pdfIn PDF document text
    • http://files.cellphonerepairsolutions.com/uploads/1/3/1/4/131453541/7f76384f.pdfIn PDF document text
    • http://keketo.augustaarchersva.com/uploads/1/3/1/6/131606365/ce97f.pdfIn PDF document text
    • http://files.kudoshealth.com.au/uploads/1/3/0/7/130775657/dimiv-takipuzawemolas-purukolaz.pdfIn PDF document text
    • http://wasisol.explainitagain.org/uploads/1/3/1/4/131483222/gixab.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/ee51f182-b29c-449c-a878-6bc95f6d85d8/dumiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85be8848-2e9b-4035-8a17-b28b30e1c631/xelujalidigitugipezakigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93e6322-186c-4965-baec-117080a243d1/31732678363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9ad2ab-a6f0-4f30-8249-0d694d0f885f/40725853210.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_off0000462d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x462D 5364 bytes
SHA-256: 012b05107f6a07d419c53b51f45e6e0794b4065b5cb6e353646f2da54b8b9beb
font_01_sfnt_off00005850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5850 9756 bytes
SHA-256: 7faf275647333d3da3a85d839456e192d14a5e9ba0e0dc4485a3560006ff2087

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