Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2cfeae8be7dd86…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 01:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 863ceceed07550128fd73b07f9aab354 SHA-1: 6da82ca6e11bfd6a5c0d0ade0b420756caf0a5e0 SHA-256: 8d2cfeae8be7dd8666bca05f983c6dd064693d1fa53b9895527e86c67301f1b7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body contains text related to healthy eating books and mentions wkhtmltopdf, suggesting a lure to download seemingly relevant content. The presence of numerous Shopify links, while mostly benign, contributes to the link farm characteristic. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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=libros+sobre+alimentacion+saludable+pdf
    • http://golif.979wdmg.com/uploads/1/3/0/8/130814017/1178368.pdf
    • http://files.riveroflifergv.org/uploads/1/3/1/3/131378990/b08b4c.pdf
    • http://xagaje.jesswestwood.com/uploads/1/3/1/4/131437604/kexilafada-xuwexipudip.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/gender_definition_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/wife_zone_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/45121878165.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/xumasivedixixidajipowofer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/6431239206.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/49899042821.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/sekawil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/77351551814.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/4131479449.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/94325665693.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.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_off00006080.bin
070a69aad39757f03ad4e6e66af62e90be6a3144f1cf5b6e69bc61d733ee0d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 5384 bytes
font_01_sfnt_off000072b2.bin
2ec0a61ea67c2011c67be55307ba4f4e42d1c76c17bbd8fb2f98901e4a20103a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B2 10976 bytes

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