Malicious PDF — malware analysis report

Static analysis result for SHA-256 630768fca3717d8f…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 03:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ddefca715d1145cb5a7594961dc3a4 SHA-1: e2c7c34d3b840a3a48c04fe3853a6976bfe24436 SHA-256: 630768fca3717d8f531374c33554e462999c0602f544a575d366ba62344e3d91
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. It also exhibits a PDF link farm heuristic, suggesting it's part of a larger SEO manipulation scheme. The ML classifier strongly flagged this PDF as malicious. The document body contains the malicious URL, reinforcing the lure to download a PDF.

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.ru/pify?keyword=important+synonyms+and+antonyms+pdf+download
    • http://files.forestlakeshores.com/uploads/1/3/1/1/131164236/wedamukal-kagidipas.pdf
    • http://files.bravotouch1.com/uploads/1/3/1/6/131637529/janadoxulazaxe-wibimozuwima-nuluge.pdf
    • http://files.skinboutique.shop/uploads/1/3/1/4/131406202/3164507.pdf
    • http://files.rcaeop.org/uploads/1/3/1/8/131856392/fosolazatame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/11885086339.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/cognitive_development_in_middle_adulthood.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/75823884783.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/timek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/nevumojupajodejisenowet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/79430500029.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/96922035255.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/78808044826.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/aircraft_structural_design.pdf
    • https://cdn.shopify.com/s/files/1/0439/5279/9902/files/norma_tecnica_de_anemia_minsa_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/soxap.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/zizegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.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_off00008058.bin
300f82a11e285bdf02384e540e085c81086d78172598f3c677926325dc06ce40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8058 5320 bytes
font_01_sfnt_off00009261.bin
bcc83a7181f64db1c41b1b45e915fe823a27715482ff7ace5e0a4187d3be8f29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 10012 bytes

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