Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9d707691e3b855…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 01:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d352749086d2b0b9de1e5f5072894da SHA-1: b41c77cef5d46d372d5d6f15207ecf05e0c013ab SHA-256: 3b9d707691e3b85549b5aea24d4071fce8496bfdbe0a8585005e3c6b9e88ebf9
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the document's primary purpose is to redirect the user to a malicious site, likely for malware download or phishing, using a deceptive download button lure.

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.
  • 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
  • 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.me/wix?keyword=mac+miller+good+am+download
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/classes_of_fire.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/confidential_report_format_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/sugidijawedodiwexo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7270/8765/files/ba_1st_year_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdf
    • https://static.usrfiles.com/ugd/b8c837_324515305199475094a32b4d83eec13b.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/dell_ultrasharp_24_monitor_u2419h_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/sanazexiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/sadamezumaviraxoraxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2076/9685/files/dominio_abstracto_ser_bachiller.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/81383181308.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/vocal_adduction_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4966/files/volume_of_rectangular_pyramid_worksheet.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_off000060de.bin
198b53a6f219f7c5b6a209af619025c91fb23f100868bb89b5fbd0581c6b260f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 5180 bytes
font_01_sfnt_off00007271.bin
a66de9c501051d7c7be0e6fcf2f65be42b31696047bedaeef8d99c38976cb76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 11852 bytes

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