Malicious PDF — malware analysis report

Static analysis result for SHA-256 66dbc69a1c604b6a…

MALICIOUS

PDF

34.4 KB Created: 2020-08-18 21:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57960cde0c0efc2a453a40e7c5887d32 SHA-1: 0dedfbcbf3fc412ceca996e0c332a203a02b6b92 SHA-256: 66dbc69a1c604b6a58e2d2f4bb328ad6e73da8280d123380c6d5be6b2b715683
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=cooking+academy+2+full'. Another critical heuristic identified a PDF link farm, suggesting a large number of outbound links, many pointing to Shopify domains. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, reinforcing the lure.

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=cooking+academy+2+full
    • http://files.hungerandthirsttheatre.com/uploads/1/3/1/0/131070450/vifudiduwe_rajomexiva.pdf
    • http://files.miehayashimusic.com/uploads/1/3/1/1/131163959/a0e895e834747e.pdf
    • http://files.justdupree.com/uploads/1/3/1/3/131398292/luporojupuvinux_badunisawumetaz_fozume.pdf
    • http://files.lakeviewtherapygroup.com/uploads/1/3/1/3/131378923/limupuvagukix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/maths_addition_worksheets_year_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/10434212430.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/abas_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/36203507133.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/makebegojixudizubeti.pdf
    • https://cdn.shopify.com/s/files/1/0435/5053/9940/files/american_streets_address.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3669/files/1524084323.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/5843942040.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/structural_analysis_9th_edition_solutions_manual.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_off000048dd.bin
593335a63b5d5fb8ed8c6cbf5325324632acb1c3a779dd86f63633b80fd11e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48DD 5268 bytes
font_01_sfnt_off00005aca.bin
0b0c0d082b19d65a313e93b6d1db17375d242474aba2daa6eec9029ce89ea948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACA 10052 bytes

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