Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b35c28270c26e8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-23 12:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 678f8ff4262265c98fa9f83252ef6017 SHA-1: 0f8057295e06af69d954a742244e821b8e687568 SHA-256: b4b35c28270c26e8c8256c6714604e7325633edb3ddb46a8fd7793f186ce3f5f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'animated powerpoint templates 2018' and the malicious URL, suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a link to malicious infrastructure, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The file was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which may explain the presence of numerous links.

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/pify?keyword=animated+powerpoint+templates+2018
    • http://files.thecoppereasel.com/uploads/1/3/1/6/131606550/4964ca0.pdf
    • http://files.cbdwholehealthshop.com/uploads/1/3/0/8/130813132/2626702.pdf
    • http://kegufuner.drashleyroxanne.com/uploads/1/3/0/7/130738542/gafevomodufi-womunekiz-nirevato.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/39409354821.pdf
    • https://cdn.shopify.com/s/files/1/0438/0481/9613/files/butiluk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/capacitor_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/tables_of_houses_astrology.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/48923847758.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/gunanebif.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/ditekukiwitezaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/siweguj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/mibeluga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9912/files/moment_format_current_date_time.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/pujivuxawefofavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/63955472399.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_off00006455.bin
a5bb0aae8c21384df8cb0b16a5e9a46fb02b868786d743c5cd82fea6098c042b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 5708 bytes
font_01_sfnt_off000077b2.bin
ff73fecb7b2eb9906bc41f9ff8d30d359953981044609c62622d8df6da470d5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 9796 bytes