Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9ad2485c7e97c7…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 03:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59c71cede30dc9a6a8f1e73a4d4758a7 SHA-1: 1b17bcb5ce29dcdedbed31f8c958c74b9380fe6c SHA-256: 4b9ad2485c7e97c7d97b8562e1ec8b7b67b62c413316e20df9aa7c222f91a62f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Starbucks almond milk latte nutrition information' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm indicates an attempt to manipulate search engine results or distribute malicious content broadly. No scripts were extracted, limiting the analysis of further execution steps.

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=starbucks+almond+milk+latte+nutrition+information
    • http://files.annmartin.co.uk/uploads/1/3/1/4/131437513/wunowor.pdf
    • http://files.moftydentalclinic.com/uploads/1/3/1/0/131070925/piverisikukopo.pdf
    • https://cdn.shopify.com/s/files/1/0454/0334/0968/files/michigan_alcohol_screening_test_spanish_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/6165459951.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/26623815043.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/16593611765.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/wimube.pdf
    • https://cdn.shopify.com/s/files/1/0450/7946/2040/files/free_editable_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/80058350496.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/posepititofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0528/files/marketing_communication_manager_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0428/4140/7644/files/20294342833.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/95355972413.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.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_off00008d37.bin
d612b258a51b6b0b81cdb26aac4ea65166eae63ecee8e45ce6311b3c57ca0685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D37 5476 bytes
font_01_sfnt_off00009fb1.bin
791b6746d7801c689bcebc672f7c80c79158fab93e56c1c7f91e191aa2a79ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB1 10268 bytes

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