Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11c7f715bb41134…

MALICIOUS

PDF

41.3 KB Created: 2020-08-03 09:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8941b0942d04a273d31d95e0d30009d1 SHA-1: 130545d2e99e3b24366cb48b75f4bb6e778aae8f SHA-256: c11c7f715bb41134ef3be7279b1292977bd1ac01fc54048f6053a48c8c542f7a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=worgen+druid+colors, which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=worgen+druid+colors
    • http://files.kindercaravan.net/uploads/1/3/1/4/131407247/65afd38.pdf
    • http://files.stjohnsgladwin.org/uploads/1/3/2/6/132695746/galev.pdf
    • http://files.littlestarzpreschool.com/uploads/1/3/0/7/130775400/df3d5e.pdf
    • http://files.internationalcancercluster.org/uploads/1/3/0/8/130813100/a03c032.pdf
    • https://cdn.shopify.com/s/files/1/0429/3319/0823/files/57741196419.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/21940853615.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/11784299483.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/geometry_textbook_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/68933611754.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/95902465110.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/bifenojekoxuwixofejiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/49031049404.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/zojekibatakitezug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/togosutugirorovutugetugud.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_off000056c3.bin
2cbce6d805424b59f3df441c709c1f9441b3e191bf295979f4a233b575067dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C3 4712 bytes
font_01_sfnt_off000066d3.bin
79fb86a6b2faf8090566e9522f9d1391852173ca764230b9c033cf27afc01c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 10392 bytes
font_02_sfnt_off00008a53.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A53 4324 bytes

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