Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fa8056d548f676…

MALICIOUS

PDF

44.0 KB Created: 2020-08-09 19:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7781b671e4c191c266d762adfedcf3c7 SHA-1: 5ed4e53c5f352ce9173660f8326b016230ccf8df SHA-256: 63fa8056d548f676da2e5cf6c5ffca62124709246d94240eb4ea66f51f3386db
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=balance+general+de+una+empresa+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to 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=balance+general+de+una+empresa+pdf
    • http://lewesuvi.sonofatabey.com/uploads/1/3/0/7/130775162/274cec37e4.pdf
    • http://files.audio4n6.com/uploads/1/3/1/3/131378942/31ce8.pdf
    • http://files.socalbiblestudy.com/uploads/1/3/1/4/131438423/617076ac42303c.pdf
    • http://foseweme.environmentalspillcontrolllc.com/uploads/1/3/1/4/131482995/fesotesofixum.pdf
    • http://files.wealthynationinstitute.com/uploads/1/3/0/8/130874678/ramifunujubibamase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/xiruvajorug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/febesajodizeroxirefafove.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/xipomow.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/damekazivadebolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/fosifepiwovusiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/83938403364.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/who_s_afraid_of_virginia_woolf_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/vexefipizukomizapobeto.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5352/files/88257380854.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1039/files/application_of_ampere_s_law.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/philips_voice_tracer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/global_paint_and_coatings_industry_market_analysis_report.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_off00006bd8.bin
eb395a8daa688e0ce7842c403f9fca562cd7a35eccd0e4abd4974e9a5e1f165e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 5524 bytes
font_01_sfnt_off00007e8c.bin
f520bc821d6eaec50af82be16fc591bae4835c8f6521c42b1ea85b4d7502ec91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8C 10756 bytes

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