Malicious PDF — malware analysis report

Static analysis result for SHA-256 120e60d2747a7461…

MALICIOUS

PDF

82.1 KB Created: 2020-08-24 00:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 592cb88dc20264d23ce622f5694a038e SHA-1: 35a206b303d9f24e9edd555dd8d5bd49ae98b711 SHA-256: 120e60d2747a74618c0830e8dcc9c8d459ca8024d72156f76f313bb9a769d3ba
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=ultrasound+abdomen+report+format'. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful 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.ru/pify?keyword=ultrasound+abdomen+report+format
    • http://jetunax.calaverasarts.org/uploads/1/3/2/7/132741100/3500105.pdf
    • http://files.tylercreekconsulting.com/uploads/1/3/1/8/131871902/jatene.pdf
    • http://files.yoya-textiles.com/uploads/1/3/0/7/130775649/548291.pdf
    • http://files.birdingaroundnyc.com/uploads/1/3/1/0/131070842/gawelorojat-busipexibovo.pdf
    • http://jetuv.memslab.net/uploads/1/3/1/4/131437792/9847902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/wuwodibokukojidixaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/nakasotezadidal.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/alcatel_pixi_4_8050d_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/lonob.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/81933547088.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/code_generation_in_simulink.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/81718029202.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1739/files/top_ten_addictive_games_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/nigejoseginalodebolozu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/descargar_mapa_carreteras_asturias.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/blank_certificate_template.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_off0001035d.bin
3e12a84664f6f16272832bf835d3d693391b040cbf4a8b8d370084be70b0edd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 5316 bytes
font_01_sfnt_off0001154c.bin
859f18d4f976de01bced2081c1bb2f3853fcf792ac46ee3bd6eeb7d7bbc5e065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1154C 11208 bytes

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