Malicious PDF — malware analysis report

Static analysis result for SHA-256 0022fd8080dd2f92…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 04:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2a353d21a32cc2bfa7871ca5189aa8 SHA-1: 08166d0abd7edd6a351ffee74b68bf1ff7c60d25 SHA-256: 0022fd8080dd2f92e420f330ab161a7ad1c06be7803009aae79cbddcf55cbffa
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF is part of a larger link farm, likely to improve search engine ranking for malicious content. The ML classifier strongly supports the malicious verdict.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=magazine+articles+pdf+files
    • http://suler.ywambethlehemsa.org/uploads/1/3/0/7/130776131/388e8e0242b1dd.pdf
    • http://files.classroomdoodles.com/uploads/1/3/0/7/130776645/7349766.pdf
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/6/131636990/sifixoj_jutixepipi_bevasagipaxuja_sivosukisozi.pdf
    • http://files.jasfinsecurity.com/uploads/1/3/1/4/131453823/tuwevigev.pdf
    • http://files.sheriterrell.com/uploads/1/3/1/8/131856492/kadonefopuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/43463762247.pdf
    • https://cdn.shopify.com/s/files/1/0431/4546/1909/files/minecraft_beta_1._7._3_texture_packs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/sabejadaxifafalusaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4290/6007/files/zasodasazuworel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/17757576900.pdf
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/83883058866.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/33613370137.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/eshop_codes_no_surveys.pdf
    • https://cdn.shopify.com/s/files/1/0450/3034/2806/files/libros_de_mario_benedetti_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/96028104796.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_off00006574.bin
a17011cbd33ba4b2edecd54e57933ef018f11282d05badc59e0ed7a2633b366f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 5380 bytes
font_01_sfnt_off000077e8.bin
acfed47b281382a71aa5819c3a2c840a59bf6aa79b0ebb9248e6676d1d05ebe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E8 10172 bytes

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