Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5b1869b326ab0b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 09:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf9cb4b0754ed0dfdd6362bc9c474b9d SHA-1: 4590a8f17bf66a831869f3096293080f14942738 SHA-256: ae5b1869b326ab0b00c3d18c0de6717d448f4e383063a50f4dc9e326cf24082f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=jean+pierre+garnier+malet+libro+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body contains garbled text but includes the suspicious URL and a reference to 'wkhtmltopdf', suggesting it was generated programmatically to appear as a search result. The primary intent appears to be redirecting users to a malicious site.

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.cc/wix?keyword=jean+pierre+garnier+malet+libro+pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/sobir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/dovuberegifofinere.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/tenisonidud.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/90403179767.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/32345595349.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/pdf_to_word_online_free_no_email.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/carte_monde_vierge.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/characteristics_of_a_self_actualized_person.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_62f7051a6aa44f00af4c162dbf46a867.pdf
    • https://static.usrfiles.com/ugd/9e41f0_a5cad3b7d6c94e48b9d62761b59260ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_4acb61775aba4814b8ffe6d21a0a440a.pdf
    • https://static.usrfiles.com/ugd/a64c8c_b581fec162774d47af30a82d438428b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_040c7584a9a24ecc9a3cd31e372d9080.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/kosoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/prologue_to_the_canterbury_tales_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/22877039547.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_off0000624b.bin
544598c7bf1c902f65e51f03248def04f91c93b2725b771ec5b14fffbafe6671
pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 5312 bytes
font_01_sfnt_off00007439.bin
02e2680b9c3d02e4488abc6751eb470fad37ad59bb20fff23a128a06b0d79849
pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10060 bytes