Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7bbe7a0e0f6b3a…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 04:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa7384ef8ca265b7d2a8ade51151e03 SHA-1: 0235936710977cf9f2db537c10af910156d0fdcb SHA-256: bf7bbe7a0e0f6b3aa68a1d6a84a0b15ffb7adbd63cf504832fad0d17e5b330f8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=aspera+client+manual'. This URL is presented within the document body, likely as a lure for the user to click. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The primary intent appears to be redirecting users to malicious infrastructure.

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.com/pify?keyword=aspera+client+manual
    • http://wofeli.tim-mcdonald.com/uploads/1/3/1/6/131637254/53de00d.pdf
    • http://files.deepdivefantasyfootball.com/uploads/1/3/1/3/131379706/ed578.pdf
    • http://files.vjvhomeimprovements.com/uploads/1/3/1/1/131164431/9c70b6070617.pdf
    • http://files.garykitecomputerservices.com/uploads/1/3/2/6/132681201/216642.pdf
    • http://files.owenashton.com/uploads/1/3/1/6/131637635/9737379.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/pipobirasak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/reden.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/migugodexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/beating_the_street_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/ruby_system_command.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/que_es_falciforme_positiva.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/jaxefobegafubisalanoruz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/simpson_260_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/asthma_treatment_guideline_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/libro_estadistica_descriptiva_uned.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/manning_schedule_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_off000054d3.bin
0798649eddd13a7174ea2431892de0ba032ab6fcff4cc7ad2a7ad86494328b9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D3 5068 bytes
font_01_sfnt_off000065ef.bin
cffa9e48e5d24872273e39d260519b9e209b0f63d7ba714271687edddf6d04b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 10424 bytes

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