Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a514d2fa0e9483…

MALICIOUS

PDF

38.1 KB Created: 2020-08-26 00:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bea75c1c41fbf551a7ed5b17a6c88d3 SHA-1: b22f65258a06c6aa552ecf2f64d3e85692e4bfd0 SHA-256: d4a514d2fa0e948304fea2c997d20b4e9f04000d9fba6ad5c5db57a45af8dcab
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=acercate+a+la+quimica+larousse+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and other URLs hosted on cdn.shopify.com, suggesting a coordinated effort to direct users to potentially harmful content. The primary attack pattern involves luring users through a seemingly innocuous PDF to malicious external sites.

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/pify?keyword=acercate+a+la+quimica+larousse+pdf
    • http://files.devcaribe.com/uploads/1/3/2/6/132681560/xezutuk_mitafatevej_garodudopaboja_pajepepoziwer.pdf
    • http://files.lccretail.com/uploads/1/3/1/4/131411199/7b930c4e6473e.pdf
    • http://wirumi.shanghaicarrentalservice.com/uploads/1/3/0/9/130969363/e95dc6c8700f2.pdf
    • http://vumixuzo.hamilprojects.com/uploads/1/3/2/6/132682883/4147898.pdf
    • http://devedime.pesfusd.com/uploads/1/3/1/4/131482916/9602127.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/93241639774.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/vukomukipiramagazufo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/joxurukevib.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/british_museum_free_guided_tour.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/wufosem.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/29975521034.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/zepefigadozizobefakuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/92015324208.pdf
    • https://cdn.shopify.com/s/files/1/0450/9014/4421/files/6580801314.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/xowodudotalasipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/interview_questions_and_answers_for_manager_candidates.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/kodi_metalliq_error.pdf
    • https://cdn.shopify.com/s/files/1/0430/7615/7607/files/context_clues_worksheets_printable.pdf
    • https://cdn.shopify.com/s/files/1/0440/7017/4870/files/federal_employee_performance_improvement_plan_template.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_off000057c8.bin
9a7e503fbba0078de8bfcfdf67e87b381398c57043e79963196349590f70bac9
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C8 5416 bytes
font_01_sfnt_off00006a10.bin
ae967bc71c89359b73173b47f0affd11bf28099f2813ed6a8d364bfc93891ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A10 9304 bytes