Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d8418bada4b26b…

MALICIOUS

PDF

43.5 KB Created: 2020-07-31 05:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 315e9fa8343ad9dd817aad23d0328e68 SHA-1: 35d044b8fd0a872b7979cd66a23347aef5ff4f86 SHA-256: 08d8418bada4b26b19d0f2f540dc39e131c89d0c625c4dc0731df187e0b9b7af
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'children s bible stories pdf'. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests this PDF might be part of a multi-stage attack involving password-protected archives, often used to bypass gateway security. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=children+s+bible+stories+pdf
    • http://files.christopherbmooneystudios.com/uploads/1/3/0/7/130740142/5d6803ac7.pdf
    • http://files.ervanariasaomiguel.com/uploads/1/3/0/8/130814234/6438529.pdf
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131406762/wugagumigejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/mipazesidofosabajak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woziki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/44910490972.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/tatagufasasaxopobu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/gekofujugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/guwamawutoverumonizugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/zigovow.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/taxunavivagilavige.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/bututoragekozozewisako.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/79640017903.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/90448928954.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/sabaxepolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/fixajuroji.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_off00006f95.bin
32491f9e93231afca42fb9ff2c251445d146f7307626d73a7086bbcb76665c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 4872 bytes
font_01_sfnt_off00008007.bin
de954a18e91e653818ba425f237875a6e0b8373b016d9c450726752fb3e46622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8007 9684 bytes

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