Malicious PDF — malware analysis report

Static analysis result for SHA-256 38aa51edcfac77ac…

MALICIOUS

PDF

55.1 KB Created: 2020-08-11 15:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06369113ef8f1b22fef80f53ad774ee SHA-1: b9696073827e6e119ea921cb1d2f991ed6972194 SHA-256: 38aa51edcfac77ace038fb184602c149add47d6b649edb1ef7b66f6cee1719f4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a quality management PDF. The ML classifier strongly indicates maliciousness. The embedded URL points to a redirector that likely leads to a malicious payload. The document body, though heavily obfuscated, contains the malicious URL.

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=definition+of+quality+management+pdf
    • http://magaxidi.karriejbutler.com/uploads/1/3/1/3/131398455/8dbfac134.pdf
    • http://files.beautydestinationbykay.com/uploads/1/3/1/6/131606069/2641313.pdf
    • http://files.thecenterforhopeif.com/uploads/1/3/0/8/130873922/suxix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/caverna_de_plato.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5754/files/widokadivizonazagofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/91540944366.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gewafavabawakaxatowibilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/sobosarob.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/28160537113.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/sagajowid.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/desafujidusijeto.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/balder_bayonetta_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/dokujuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/dixogowosaburovorufaje.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099d2.bin
003f6032548bf2c418a109107e060a5aa11e2239b23ff80e705fb1c37a0516a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D2 5312 bytes
font_01_sfnt_off0000abdd.bin
d6f44fbf737132787bef928fdd5d3954e3393b700c892eef4ef107041216ac79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABDD 10368 bytes

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