Malicious PDF — malware analysis report

Static analysis result for SHA-256 01aa8387593e8b4f…

MALICIOUS

PDF

45.2 KB Created: 2020-07-31 08:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ba53078b0a3a7701fb41f5bd426b6fd SHA-1: 880c4952d3c383dd451567d38dc0ca4ae1f622cc SHA-256: 01aa8387593e8b4f5f8ac793bd8d6e9b0eadf3d50ea6f33904ff0e66fb01e55f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to a "Thermax boiler manual pdf" to entice users to click on these links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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.ru/pify?keyword=thermax+boiler+manual+pdf
    • http://files.paintballparadisebend.com/uploads/1/3/1/4/131456012/fixujifuwaxep-susoj-xuratoz.pdf
    • http://files.crewkernebowls.co.uk/uploads/1/3/2/6/132695663/4194364.pdf
    • http://files.naturalborninsomniac.com/uploads/1/3/2/7/132712315/ganagisel.pdf
    • http://files.fitoutsqld.com/uploads/1/3/1/1/131164310/giziwed-mafaz.pdf
    • http://files.lesprihaitimission.com/uploads/1/3/1/4/131406182/3256877.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/32336746778.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/26027800499.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/zirafatuvopabuniwudozuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/naravukawekagibep.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/lijixivinowubitigum.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/falamikoziloripuzum.pdf
    • https://cdn.shopify.com/s/files/1/0430/3562/3578/files/dugojexalaxefevobesob.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/velewulekok.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/27843791854.pdf
    • https://cdn.shopify.com/s/files/1/0434/9332/7008/files/74238249241.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/terajujojefinobobosunuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5815/files/19155065161.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.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_off00007290.bin
3a3e979978a42712d80c4b61f6176317fdd57bb9224a646c6852b589216a9511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 5064 bytes
font_01_sfnt_off0000838d.bin
155c59098eb56973a73a0651d31020db9ddd7510eec04ea359ab16ea91abd4b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 10492 bytes

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