Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11ebfd882139893…

MALICIOUS

PDF

36.2 KB Created: 2020-08-05 09:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3056f0942954ae804acf7630896fa5d6 SHA-1: 42d3ece87181e8d9bb0c8bd448356ed43764bd5c SHA-256: d11ebfd882139893f7e696dc9c8db6ef9afe67d3e7fb66f0e0ba7b7a2a845298
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to Shopify domains, but the primary link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other links, suggesting a lure to a malicious site. The presence of a link farm and a malicious redirector indicates an attempt to obscure the final malicious destination.

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=alesis+nitro+manual+pdf
    • http://files.hilarymurphyphotography.com/uploads/1/3/2/6/132695336/zokijader_voxale_beginop_numobibap.pdf
    • http://files.adornedabode.net/uploads/1/3/1/6/131606291/lasawizutiwi.pdf
    • http://files.katiegage.com/uploads/1/3/2/7/132740384/2287363.pdf
    • http://files.insightcounselingc.com/uploads/1/3/0/7/130776728/wobepazox.pdf
    • http://files.colordesignstudio.com/uploads/1/3/1/6/131606533/lejemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/myth_and_meaning_cracking_the_code_of_culture_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/57648300728.pdf
    • https://cdn.shopify.com/s/files/1/0434/1442/1653/files/boy_scout_of_the_philippines_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/2233760171.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/abdul_kalam_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/6615/5430/files/79016878934.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/29922835032.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/29781830158.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/jefugazilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/iran_sex_pic.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/how_to_install_enb_new_vegas.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fa6.bin
53b977978ee9ed11d6396efce79c29b85d6f966f05a9b8c121929b7584220a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA6 5176 bytes
font_01_sfnt_off00006129.bin
ce7d9b85a08ff59e91479c0a381fcc462eef9b18a2eb220cca732b9948f29293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 10280 bytes

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