Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a73cce608406a0…

MALICIOUS

PDF

43.9 KB Created: 2020-08-23 07:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f3005e3931374c20d45cc799fd748d3 SHA-1: fa2a9a4b44084d92c62ec41d1752d3d09478cddd SHA-256: 20a73cce608406a07684b440ce373f66c3312f7d706660fa6ec986440298801f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=credit+card+authorization+form+aviva', is designed to lure users into clicking it under the guise of a legitimate form. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for obfuscation or to appear less suspicious. The primary malicious IOC is the ttraff.cc redirector.

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.cc/pify?keyword=credit+card+authorization+form+aviva
    • http://patujelo.highperformancecoachkelly.com/uploads/1/3/1/3/131383483/1379443250.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/yoga_sutras_bks_iyengar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/metabolisme_anaerob.pdf
    • https://cdn.shopify.com/s/files/1/0434/0380/4823/files/27204295377.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4540/files/93970459645.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/wosanura.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/clasificacion_del_cancer_de_piel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/44604927232.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/snow_white_and_the_huntsman_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/reformed_baptist_church_memphis.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_off00006d48.bin
a86bba1bdf9ae7bf2ebf03be55d9ece27c2e8484e90aa398f314d4490d713118		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 5068 bytes
font_01_sfnt_off00007e5f.bin
2ea4a79e117ff75fa2af8f24cb75b7a1ef6d8b52bd461d05fc4f2dfe9d53e0b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 10640 bytes

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