Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea72c4507b59c441…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 00:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de5538d541db1e4b9f3aae6b0a84f44 SHA-1: 8864ae2b74f5ef2ec9538cece6d1aad17812f70b SHA-256: ea72c4507b59c44179c526e5cc8e00d21f882acdeac6ef66c02846445fa1d2c6
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 of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=free+color+by+number+sheets+for+adults', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect users to malicious infrastructure under the guise of providing free 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.cc/pify?keyword=free+color+by+number+sheets+for+adults
    • http://files.amussispainting.com/uploads/1/3/0/7/130740148/c4c9371e.pdf
    • http://judamu.neamakrihome.com/uploads/1/3/1/3/131381533/wibotonamojojek-lafop-gevivi-lofum.pdf
    • http://files.asyapassinsky.com/uploads/1/3/1/4/131453252/ditigipamixete.pdf
    • http://kafeda.indianlakestables.com/uploads/1/3/0/8/130874429/nitijaka-gavazo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/rajegikime.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/nikedixowifomemarage.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/vobow.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/analyse_formulier_spelling_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/69725804544.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/tolununuwoze.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/nalukaxubonesuxirifit.pdf
    • https://cdn.shopify.com/s/files/1/0449/9714/8830/files/lukozesifarivoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/transformer_polarization_index_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/2061961142.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/jixovesilajoxazako.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_off00006167.bin
4899e1ba26d520f80fd2a4e072076bc5e8a6e96898f59a4b49950c3cc7cda863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 5456 bytes
font_01_sfnt_off000073c5.bin
07bffaeb384bb7b0d823b04a592186e40cfde7ef3cb0a68cd3caf2fe0d840048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C5 10000 bytes

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