Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcab67f03df2755…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 10:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcac5be2cb34babe84f00c76053936f0 SHA-1: cd4faa88ccdd59aedd374bc05a4907f5c4b3278e SHA-256: 9bcab67f03df2755a0dee7ab7aa38ff882e01197b4fdc1a39da5cdc0ea46926f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and references 'enochian text generator', suggesting a lure. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with the first being to a Shopify domain. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=enochian+text+generator
    • https://cdn.shopify.com/s/files/1/0459/1730/7029/files/bootstrap_credit_card_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/zuraxetiretupojit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/applied_multivariate_methods_for_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/40708645918.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/54344439951.pdf
    • https://static.usrfiles.com/ugd/b8c837_aad9bfa8932b404c8e8472955442502f.pdf
    • https://static.usrfiles.com/ugd/b8c837_45196fe3485d4e7aa8fe48fa926bbd1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_77221a66c268461892ee2ec5bfdc527b.pdf
    • https://static.usrfiles.com/ugd/b8c837_de82ef8dd8774e5a86d629f3711181a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_03a38d3ee55f42c0881c854eeebf817f.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/lepibuwonareduvevaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/111_b_mime_for_a_change_trilulilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/lipipadiwiverejato.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/37733744373.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/65490198736.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_off00006118.bin
991a9f5e74d6bd5adf1456255a9f154e837f4cab8fe569701b3472c7c11d2cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 4876 bytes
font_01_sfnt_off000071aa.bin
57b220efe264c1faf65d4eee1a82aa35ae236d5c5dbcd3f630d5928fdc5f41cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 13800 bytes

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