Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c466bcf631c8aaf…

MALICIOUS

PDF

45.1 KB Created: 2020-08-08 09:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 899e62a35c8fb1797619087d4b154ad8 SHA-1: 850d13112fe468e6f8ef5416e0e58c91276dc926 SHA-256: 3c466bcf631c8aaf945d87030bd69d734ecbfff90827864861052ada13855c46
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=aprender+a+dibujar+rostros+realistas+pdf'. The document body, though heavily obfuscated, contains text fragments related to drawing and the PDF generation tool, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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.ru/pify?keyword=aprender+a+dibujar+rostros+realistas+pdf
    • http://files.moirsa.org/uploads/1/3/1/3/131382808/lulinuzigutoxe.pdf
    • http://files.annalisacrawford.com/uploads/1/3/0/9/130969312/7579905.pdf
    • http://files.atyourservicelimosjax.com/uploads/1/3/1/3/131383318/6830482.pdf
    • http://nafup.ericmouledoux.com/uploads/1/3/0/8/130813834/3b41cbcd27.pdf
    • http://files.christiansciencegreatfalls.com/uploads/1/3/2/7/132710565/820be361ae87b6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5704/4904/files/82007301525.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/branson_3510_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/sifufuzebekuvodo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/37921947271.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/vedabimigakasot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/doragewotupepefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/vosevo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/55588099125.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/87553144210.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/acceleration_definition_physics.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/mazuzagulijowa.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/mount_and_blade_star_wars.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_off00007147.bin
508e8b06c24cdace81f352d532259494aeb67689ca4cc23e4cf23980958efd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 5240 bytes
font_01_sfnt_off00008323.bin
a5a96fb361c0600569c3d3ee814ce805f81b28632ee3460022459b5ce0f96a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8323 10464 bytes

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