Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8df0b675bcbcbb5…

MALICIOUS

PDF

61.5 KB Created: 2020-08-31 11:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23d508391fb9d49778492f3b3914b4e SHA-1: 7eb71eea544cfbd7a48f9df3dd832c582c03a8a0 SHA-256: a8df0b675bcbcbb548037fed8302fc705d925de10c77069dd59bd986ed0d2d73
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=gare+du+nord+to+gare+de+lyon, which is likely used to direct users to further malicious content. The presence of numerous links to PDFs hosted on cdn.shopify.com, even though many resolve to benign content, indicates a coordinated effort to obscure the malicious intent or to leverage SEO techniques for distribution.

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=gare+du+nord+to+gare+de+lyon
    • https://cdn.shopify.com/s/files/1/0438/2277/6477/files/android_vs_ios_security.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/gratitude_list_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/vadizijekaped.pdf
    • https://cdn.shopify.com/s/files/1/0438/5095/6960/files/47215513210.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5039/files/87474961190.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/morabepidesiguzafel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/91602662135.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/divib.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4018/files/21417278518.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/build_max_heap.pdf
    • https://static.usrfiles.com/ugd/1be480_9dd2a2c6c91142a3b913e1b062828113.pdf
    • https://static.usrfiles.com/ugd/19103d_14e933ccb3f64b1dba504420e8d023fe.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_7392de5e89624a578640a98a62d23099.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1e65132d22e40e49b5d033b17b4eb19.pdf
    • https://static.usrfiles.com/ugd/99afdc_dac532097bdb4a8e9dc1be12cc01c9c1.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_off0000ae16.bin
3dc00d7ae779459b118a1f18a8c0164342dfc8d8e4570834ea6306953e1203ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE16 4948 bytes
font_01_sfnt_off0000bf07.bin
d6587e4e48e28b4814ac39c8b72433c4b129fae88b234a666e01e44213b7f47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF07 12896 bytes

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