Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a79d53aca8cd57…

MALICIOUS

PDF

53.0 KB Created: 2020-08-13 12:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c1a5d20a184f653655c9275aa0428e SHA-1: a65d95b3db2ac89af8b1c0e7ac9cf45758899390 SHA-256: 59a79d53aca8cd57fe9e2d57acd146c7ad7d660671364b48245523556a9e0f54
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to lure victims. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect users. No scripts were extracted from this sample.

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/wb?keyword=compiler%20design%20lab%20programs%20in%20c%20pdf
    • http://files.novamentalhealth.ca/uploads/1/3/0/8/130873947/414ee326b613d.pdf
    • http://files.trailofhumanity.com/uploads/1/3/0/9/130968981/desewaxajaf_nekobezefube_gazudubogabi.pdf
    • http://files.bikerbabesoaps.com/uploads/1/3/0/7/130775520/3503067.pdf
    • http://files.evolve-nutrition-vitality.com/uploads/1/3/1/3/131379949/soguponezaxido.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/bupusasa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/fisitoso.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/excel_fv_function.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/bacillus_thuringiensis_control_biologico.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/gukusurazalikirobumaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/widepiwalujutovanezide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/93121237980.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/zamusawalerezedifogez.pdf
    • https://cdn.shopify.com/s/files/1/0432/8334/9657/files/arturo_perez_reverte_la_reina_del_sur.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/libro_barcos_que_vuelan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/ferezu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7239/6193/files/atualidades_concurso.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_off00007f5a.bin
c6afee52d671a32ff0bd42f21a5bd100898a00993518991293d97e6c4bd06247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5A 5520 bytes
font_01_sfnt_off000091ff.bin
4b7fd53b817f6f5c36903008ecf72ee6fc7466cc628d719fc97b0a3b276c8d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FF 17300 bytes

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