Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd4cfcd931029dd…

MALICIOUS

PDF

59.6 KB Created: 2020-08-18 23:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fff014b3d6149635eb3bb7119e6ce83 SHA-1: e5c3359232208b8430bd513bbfcd133728fb2f8f SHA-256: 0bd4cfcd931029dd8298ef664df776d2a64a58ce191e0bafcc44060f706cfb13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The primary URL, 'https://ttraff.com/pify?keyword=wound+assessment+form+nursing', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme designed to lead users to malicious 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.com/pify?keyword=wound+assessment+form+nursing
    • http://files.marywillock.net/uploads/1/3/1/8/131857421/6faa43c60cee.pdf
    • http://files.glomhi.org/uploads/1/3/1/4/131407247/vejawofotaregigozi.pdf
    • http://wufoni.ronyahperformingarts.com/uploads/1/3/1/6/131606183/1656051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/wuvojaruliliveju.pdf
    • https://cdn.shopify.com/s/files/1/0445/4960/3487/files/23306206873.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/dokigibokofonesezunitox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/microsoft_office_on_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/fusionner_plusieurs.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/health_immunization_form_umd.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/10946529295.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/axioms_of_vector_space.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/47007909067.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/pilerurisagovavazakeriner.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f48.bin
646259d38baa3aebd09c26d4c9d786f0a90f1f4404240c011b2d7244c5883fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F48 5092 bytes
font_01_sfnt_off0000b089.bin
7634d4296c3c0d06dd51d9275f494ac0a6b661f847d25bf7857a20f06891187e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB089 10304 bytes
font_02_sfnt_off0000d3ba.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BA 4324 bytes

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