Malicious PDF — malware analysis report

Static analysis result for SHA-256 256b0e326d0ce4bd…

MALICIOUS

PDF

34.5 KB Created: 2020-09-09 09:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46cbcef1c540dc795449e1dfa548af23 SHA-1: 432d6eae6c244ff51044fbbbe29194f0b568e1bd SHA-256: 256b0e326d0ce4bdfb6777ba2b4ce11d536e9d2af3e051fa7809aa28b0f6b58b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is likely part of a link farm designed for SEO manipulation, ultimately redirecting to malicious content. The file's purpose appears to be to trick users into clicking the malicious link under the guise of downloading a worksheet.

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.link/wix?keyword=geometry+circles+review+worksheet+pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/angle_bar_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/14818754813.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/33073547783.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/bemaxx_resistance_bands.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/32102677584.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/vojepirobadelonasosewupik.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/lelikatesuxinizosex.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/13801214970.pdf
    • https://cdn.shopify.com/s/files/1/0450/8113/3221/files/blattformen_pflanzen_bestimmen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/mabejaxekiworu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/83139637327.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/39055086942.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/tarofapudodaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/arris_tg1672g_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/gapubepinekadexova.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/runajerezetezuwemeput.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_off00004919.bin
3bfccd6e74191f7ec2b6f492bc2e7dcafb5fde5eb618aaba847a557849dc0f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4919 5532 bytes
font_01_sfnt_off00005be6.bin
f4e77146adbd8a9b1f71ec3242f65e0998d7de7a729145978f0c592646b048a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 9648 bytes

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