Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5d0200aa41d229…

MALICIOUS

PDF

38.8 KB Created: 2020-08-23 06:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07499c2490e440c0cbaba55031679243 SHA-1: 6cf5f670b8758a3b01f07f836b1fb42ce13dedfd SHA-256: bb5d0200aa41d229b73917e5957c7239e07676fe921407e7e72206ee5f453c53
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links, many pointing to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=iupac+harmonized+guidelines+for+internal+quality+control, which is likely used to direct users to a malicious site. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malware through numerous seemingly benign-looking links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=iupac+harmonized+guidelines+for+internal+quality+control
    • http://files.sustainabilityconference.us/uploads/1/3/0/7/130739916/roxaxotazazipo.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/libros_de_abandono_infantil.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/bipepitiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/65519081895.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/apple_pages_template_flow_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9854/files/6693416911.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/zaguzumirezexavipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/20021258951.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/7586477949.pdf
    • https://cdn.shopify.com/s/files/1/0447/4237/7623/files/34455427402.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/23615319826.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/descargar_biblia_de_estudio_esquematizada_reina_valera_1960.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a29.bin
ef477d9c54503ccd7688d0f8cc7dda8cd0a9365e079c001a161950b7d787fbbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A29 5664 bytes
font_01_sfnt_off00005d48.bin
c971af749e1208d54d35a10177c8beba9bc13b28144918f6dd5ab9d3a778f8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D48 10236 bytes
font_02_sfnt_off00008000.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8000 4324 bytes

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