Malicious PDF — malware analysis report

Static analysis result for SHA-256 7579670eac706dfb…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 11:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 291e5777e603423d0c0ab84559248bfe SHA-1: 04ba0b49bf2a1eac77f807fca4ee50191f6e6e87 SHA-256: 7579670eac706dfb48de80e4d2ee8bf4f494dcd1e565ec583860d9f9abfbbb78
142 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body and heuristics suggest a lure impersonating a cloud service to trick users into clicking a link, likely for phishing or malware delivery. The primary malicious IOC is the redirector URL, which is used in conjunction with a seemingly benign but numerous set of Shopify-hosted PDF links.

Heuristics 4

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=convert+scanned+pdf+to+word+app
    • http://files.everyonesopera.com/uploads/1/3/1/4/131482886/73630f3bbb4.pdf
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/85849527272.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/food_quality_assurance.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/mojapisakenalapofu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/web_content_accessibility_guidelines_australia.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/apprendre_le_russe_lecon_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/importancia_da_analise_swot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/watchos_6_beta_4_profile.pdf
    • https://cdn.shopify.com/s/files/1/0435/8592/9375/files/47964349072.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/famizagedupud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/60907150395.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/mhtml_to_converter.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_off000062fc.bin
aa71b079887352661a424b54caeb2d71515d7502005e1cc70e5d1fd16507b6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 5176 bytes
font_01_sfnt_off000074b8.bin
a37cd82a5c03bbbef5e9c61b1333999470d57427505a33aebefc8bac54d9543b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 10068 bytes

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