Malicious PDF — malware analysis report

Static analysis result for SHA-256 524b273fb50bd4eb…

MALICIOUS

PDF

44.1 KB Created: 2020-10-24 11:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b7ab16e6825c2c2c7d57d6cf94c2e51b SHA-1: f7063ef4282689c82950f1d4f8a288cab7143924 SHA-256: 524b273fb50bd4eb2686a118d05998beb708de5d49d43ad735c15b8bc960c41d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/123?keyword=apple+tv+4k+vs+sony+android+tv'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site. The presence of numerous external PDF links, as indicated by the PDF_SEO_LINK_FARM heuristic, further supports a malicious intent, likely for SEO spam or to distribute further 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://ttraff.me/123?keyword=apple+tv+4k+vs+sony+android+tv In PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/6a28b9286db0f.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/konovem-xubozolupuf.pdfIn PDF document text
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/dizekanavakimok.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/7111277.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/96b50da5375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8aa16703a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8928f691277.pdfIn PDF document text
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/nefebiziduturegadoza.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/pelepoleremawov.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/gakabonatowez.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/026c6a21.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/nujitewarupulep_kiwigigutelo.pdfIn PDF document text
    • https://topejaliwas.weebly.com/uploads/1/3/4/3/134305960/3620551.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/6583597.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/nelefozarali.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/mesixadelomomo/90198922084.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/futegebawibugabejero.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/89819777362.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/rojererupevozanozuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791fba9b-efec-424b-9d3d-5a174e8bc9af/43762302279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbed0e1-8ea7-4564-a5d3-80604bb5ad0e/20893682144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0022a566-c303-4c5c-b01e-b6876e7d0262/segokasifugunewolawiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d826f092-4703-4eba-813a-96723ad160b6/sazoladutijinisatesiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7525406-f2de-40d2-9ef6-73ec92fe65e0/lokofozexo.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_off00006af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 5256 bytes
SHA-256: 546971245ffb154a50f1bd460bd84c05bea442cdf19ee1687ec9a76abd39e124
font_01_sfnt_off00007cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 11032 bytes
SHA-256: 227f1ee8f719fa8151a600d3ae95135788f0cfe6645f9e78e8a1b6da3ffe549e

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