Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1bed6f4010f5a2…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 03:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7545014effb7e66846febc9c04b5016 SHA-1: 5fe981f235a374321622588fb2707255da855d5f SHA-256: 6e1bed6f4010f5a2ab0e53d36bfba35694e92a7739f13fd4203dce8bc65b6c86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=finding+missing+sides+of+triangles+trigonometry+worksheet', suggesting a lure to a malicious site. The presence of numerous other PDF links further indicates a link farm or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=finding+missing+sides+of+triangles+trigonometry+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/84222387119.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/e_a_motors.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/zupimobifobitodoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/xaxopaxinoses.pdf
    • https://static.usrfiles.com/ugd/89363e_90732ed9a2e948a085523ebaad552df3.pdf
    • https://static.usrfiles.com/ugd/865d50_f91fc2fcb1c444e08f7fa581f4799fac.pdf
    • https://static.usrfiles.com/ugd/b3bc21_c5de9452dd9b4148b315a4ee97c7fcf9.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_611bbc6ba3144a7ba997d54037cb1c9d.pdf
    • https://static.usrfiles.com/ugd/b7082a_9775fb31d7324bb2a22d79960b0cc6f1.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a5a.bin
237e2a075d3aa2b91981f2205c0c8535ef590dc7741c00fd70f97bd4e029ae9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5A 5536 bytes
font_01_sfnt_off00006d1d.bin
5715ac8b17a591606947786f104719c105786b2d3b23b7aef88678a8d387de5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D 10636 bytes

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