Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd116dcbf3f016b…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 03:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f8c735979579c073d27578f88df7a11 SHA-1: 2764d148aabf06d72d9996e98d3d35e0d7c43b91 SHA-256: 6dd116dcbf3f016b46073e526c9a4b44cdd59a8102e5fd0baea75df93665a9a8
194 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of numerous external PDF links suggests a link farm for SEO manipulation or to host further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass gateway security by instructing the user to open a password-protected archive.

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.com/pify?keyword=filosofia+cero+defectos+pdf
    • http://zozabip.englishappliedlinguistics.com/uploads/1/3/1/3/131383629/9575241.pdf
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.pdf
    • http://files.kacihollingsworth.com/uploads/1/3/2/7/132741556/wotegavorofalifufa.pdf
    • http://files.consumershipmarketing.com/uploads/1/3/1/8/131871556/9147053.pdf
    • http://dotepevik.resumephenom.com/uploads/1/3/0/8/130874493/gurifudizugano_ruwupugevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/puxemuzokazoke.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/22431221786.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/nefipuvuvebepiniposewesoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/zugenav.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/56537139580.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/67557981247.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/buruberaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8124/4573/files/tuduxaluget.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/55834206432.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/bebiwaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/pidifigasisik.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_off00007bbb.bin
2659040586aa7f68146cf6baebd4bd7f5965148ff278498bb50372e980bbc8b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 5104 bytes
font_01_sfnt_off00008d23.bin
0f8986c985087c312985aa4813e59b391c7954db224eb6ddb4a2ec91d61e38b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D23 11148 bytes

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