Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c85012e6d1fc8e…

MALICIOUS

PDF

35.5 KB Created: 2020-08-05 05:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d61097919d94dac110e65e5a7f614585 SHA-1: f0c3763abfc42213cddd0e06c1939128242a7d6a SHA-256: 03c85012e6d1fc8ef1eede07fed9473007962efe4a8c0796bc3a4b6ab7cfb515
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 a redirector service. The primary malicious URL identified is ttraff.com, which is known to host malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=encyclopedia+of+general+science+for+general+competitions+book+pdf
    • http://files.crediblecompanies.com/uploads/1/3/2/7/132712139/617468.pdf
    • http://files.invigorateim.com/uploads/1/3/1/6/131606666/wavuzivebalex_wezes.pdf
    • http://files.mindfuldemocracy.org/uploads/1/3/2/6/132681038/tubukajelopopezodiso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5204/7272/files/37362460248.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/rizofedoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/jewivofefagev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/ruzexokelusekokifapiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6104/2591/files/nidabelelepulusuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/xaliwixox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/7522846567.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/mukudekumudogi.pdf
    • https://cdn.shopify.com/s/files/1/0449/3488/9627/files/bcs_business_analysis_foundation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/warhammer_40k_8th_edition_orks.pdf
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/third_conditional_reading_comprehension_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/4407/7722/files/temetozoviminup.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_off00004ad8.bin
683352469d763bd0fce34951f0ea7750bda545ae86daed79f5486785b13be656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD8 5736 bytes
font_01_sfnt_off00005e63.bin
1242cc1c5ddcf315e1fb833587158e2905ffbe608ab1feaf950366d4bf77ebed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 10056 bytes

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