Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a6dab3e5e24365…

MALICIOUS

PDF

47.1 KB Created: 2020-08-30 15:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a1a85fdde2aa33952433256ede69d6 SHA-1: ecd79f9c787ae1635c35ebb8a05be967c09435ae SHA-256: e6a6dab3e5e243657a146294f890316d75cf8d9318e77f3645690cb9933ba406
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=helms+deep+layout'. While many other links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest a deliberate attempt to lure users to harmful content.

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=helms+deep+layout In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/gejife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/78140173787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/64111680485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/iran_contra_affair_reading_answers.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9421c8_4d7c5eed90824895b77bf32f8517d1fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/39cb9d_860ef134b7924dc6ae98345deadc6973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5956/8027/files/jpg_bestanden_samenvoegen_naar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nijudesiko.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c03.bin
1b1c10de10f434374c9912a1e7345588a3982219eb943e8728c3dc2f645d2f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C03 5072 bytes
font_01_sfnt_off00008d35.bin
d0d6af48bddb52d31e3e4c171efadbad7050c5b834210cb9de1e3bd4d60a0127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 10440 bytes

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