Malicious PDF — malware analysis report

Static analysis result for SHA-256 715ce889a75da5c4…

MALICIOUS

PDF

117.5 KB Created: 2020-08-16 19:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e079f09a2fe22f23b66afcbe1a816b SHA-1: 4a557d1fe5c0910812d16db5b328a6d9519c8b3c SHA-256: 715ce889a75da5c432e789092a0797b146326483c57fae17d1bd3467b3b44ebb
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to 'bible study outlines'. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=expository+bible+study+outlines+pdf
    • http://files.deahphotography.com/uploads/1/3/1/1/131163578/37e252f51.pdf
    • http://kenakup.hidingdivyathemovie.com/uploads/1/3/1/4/131483281/4547774.pdf
    • http://files.dragonfly-creations.net/uploads/1/3/1/4/131406841/mefiwewox.pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/pejojobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/76772171847.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/55492529877.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/bojekozupegurixamimiwuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/case_study_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0439/7131/3822/files/juzuvujuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/81427742281.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/32630280467.pdf
    • https://cdn.shopify.com/s/files/1/0434/1622/3906/files/performance_award_certificate_wording.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/21230621215.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/29715186227.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9783/files/50591555153.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_off00019397.bin
8b416b816e4a427399b83b6caa13e1737331f966128ff7f5ac2d4b7560360fc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x19397 5092 bytes
font_01_sfnt_off0001a502.bin
8d6c352da55dde728adfe5d564637f2d1db63152f572b44365100052d5c4f541
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A502 10364 bytes