Malicious PDF — malware analysis report

Static analysis result for SHA-256 c057d6bf369ba601…

MALICIOUS

PDF

40.9 KB Created: 2020-08-19 18:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c124dd487341e81936404045fe3f2a SHA-1: c86d23a19a52b159ab99ad914a2d393798a45efe SHA-256: c057d6bf369ba6015f4863edb4c88d908c82aea98ecedf42fa8a7527bd446835
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=bose+soundlink+micro+bluetooth+speaker+user+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like cdn.shopify.com and a suspicious domain 'nuxivorov.sevenseasonsfarm.com'. The document body, though partially corrupted, contains text related to a 'Bose soundlink micro bluetooth speaker user manual' and the wkhtmltopdf tool, suggesting a lure to disguise malicious intent. The primary malicious IOC is the ttraff.ru redirector.

Heuristics 3

  • 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.
  • 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=bose+soundlink+micro+bluetooth+speaker+user+manual
    • http://nuxivorov.sevenseasonsfarm.com/uploads/1/3/0/9/130969352/gatakibegodelerugag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/zawavubujifipila.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/8693184192.pdf
    • https://cdn.shopify.com/s/files/1/0432/5900/3038/files/degope.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/platform_9_3_4_movie_quote.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/data_analytics_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0723/8567/files/xevopuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/35364917049.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/jupeneg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/defekugumivam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4780/files/wetixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0448/2108/6368/files/sinhala_alphabet_writing_practice.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_off0000605f.bin
de3665206dfe8776ef8bea435091bdba26d0e8a2a7f37ea15f68c8c17b7ba182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 5564 bytes
font_01_sfnt_off00007313.bin
ec82ebdd972ec2dca83b9116db95751dcb54398a44d8649e4d1331be6b308801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7313 10360 bytes

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