Malicious PDF — malware analysis report

Static analysis result for SHA-256 700de72208aa97ef…

MALICIOUS

PDF

41.9 KB Created: 2020-08-13 14:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc450e77576c4fec4a2531080485dd2 SHA-1: 49c4cd4decfd4d8841b213773e1639d62a0b801a SHA-256: 700de72208aa97efdad7bb7513c50d4980e2f9f23f8afa8c5c3594117e0456ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to Shopify-hosted PDF files, suggesting a link farm or SEO manipulation tactic. One URL, https://ttraff.ru/wb?keyword=data%20pernikahan%20dini%20di%20indonesia%20tahun%202016%20pdf, is flagged as a known malicious redirector. The document body itself is largely unreadable binary data, but the presence of numerous links and the ML classifier's high confidence indicate malicious intent.

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/wb?keyword=data%20pernikahan%20dini%20di%20indonesia%20tahun%202016%20pdf
    • http://files.jnhospitalityentertainment.com.au/uploads/1/3/1/4/131453252/7543791.pdf
    • http://rinex.seashack.org.uk/uploads/1/3/2/6/132681559/2080769.pdf
    • http://files.mariapalmerart.com/uploads/1/3/0/9/130969614/togitepil_ninojedebaj.pdf
    • http://files.ncelementary.com/uploads/1/3/1/4/131453267/nevosimujutob.pdf
    • http://files.bobsdinerlouisville.com/uploads/1/3/1/4/131437937/7761627.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79086372433.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/47101637648.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/sitofofege.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/824017286.pdf
    • https://cdn.shopify.com/s/files/1/0450/7539/8821/files/vivud.pdf
    • https://cdn.shopify.com/s/files/1/0440/8462/5558/files/givaneporiluditibelomiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/17272590644.pdf
    • https://cdn.shopify.com/s/files/1/0435/9795/5229/files/70853872955.pdf
    • https://cdn.shopify.com/s/files/1/0434/4768/1191/files/66634801311.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/3214355751.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/jogivabufazegiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/damulagugujebejijefoka.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657d.bin
299fe12a30d2b970e5721559c22ecbdf70072cec315ad59632f3a0bc3dcae2cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 5640 bytes
font_01_sfnt_off000078b1.bin
a95a6ed82eb59bdc409f9ff513b3aab94f211994c651a76bb9a304a435587113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 9816 bytes

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