Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdb14e8efabb683…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 17:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad14471f62b2c1cc3c824faf09412428 SHA-1: 941ae586c6f9de10a70afd9e0c9b654f1a46f96c SHA-256: bbdb14e8efabb6839cb435d8ff49109f1d0478951a7ee0fc97c6d22862b58d00
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URL `https://ttraff.com/pify?keyword=metabolismo+de+polisacaridos+pdf` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links hosted on `cdn.shopify.com` and other domains, suggesting a coordinated effort to distribute malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=metabolismo+de+polisacaridos+pdf
    • http://files.krwoodworkings.com/uploads/1/3/1/8/131871894/1591208.pdf
    • http://files.eswhsa.com/uploads/1/3/0/8/130874110/lenomobewowu.pdf
    • http://files.joneslawofficeottawa.com/uploads/1/3/1/8/131856380/wuwikefero.pdf
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/26171368758.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/59843755690.pdf
    • https://cdn.shopify.com/s/files/1/0428/8036/8796/files/kutanukalexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/importance_of_c_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/el_segundo_cerebro_libro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7722/files/automata_theory_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/insulina_apidra_bula_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/denodezifez.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/tonobato.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/vefukubumemanifanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/12340764095.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3171/files/47913004701.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/wusokogajekavuzerite.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_off0000650f.bin
7ec43dca1374627540671ad1753071f387218dae449f8800e25da115d41df7df
pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 5128 bytes
font_01_sfnt_off0000767f.bin
61cc5927548e101a5c86c708e2c7548520238469af0026ed82b2e4500ef93422
pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 10492 bytes
font_02_sfnt_off000098aa.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98AA 4324 bytes