Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e68c6e337fc0605…

MALICIOUS

PDF

39.9 KB Created: 2020-09-10 06:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e65c38b028269f35117af2b0a0819f1 SHA-1: 00e1f771fd5a5a6b178d3e75dd01fc2115312172 SHA-256: 8e68c6e337fc0605da194ef6757fe2de7d15a535b0b18ea11be3d26a78303c7d
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service. The primary heuristic indicates that these links are intended to lead users to malicious infrastructure. The document body itself is heavily obfuscated but contains the same redirector URL, suggesting a deliberate attempt to obfuscate the malicious intent. No scripts were extracted, and the PDF structure itself does not indicate further malicious activity beyond the link farm.

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.me/pify?keyword=guidecraft+light+tablet+canada
    • https://static.usrfiles.com/ugd/8a419d_9a2c59a6a26e4a8d82deae30f3349b69.pdf
    • https://static.usrfiles.com/ugd/7182f3_6f13a3f4d36c4efaa6c1ee4da20d54b2.pdf
    • https://static.usrfiles.com/ugd/fd30ac_86ecd7a61a6d4b239e71b92d628b9cb9.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/padubuposumovidigewevepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/bailey_ollis_biochemical_engineering_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0438/9135/9899/files/35940367650.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/9761140520.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/42975367618.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/javascript_array_remove_object.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/jonekisoxinusuruwavakofor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0725/4439/files/sas_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/44651817525.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/zilifike.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/how_to_get_tensorflow_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/zarejoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/gobitabare.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_off00005bc0.bin
f4704bc3d4e46e13aab6969ff62fac4c12b247394f100465dc0a5b996d194e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC0 5276 bytes
font_01_sfnt_off00006dab.bin
8c5b013cf7b835ed3e51c0018ac839317be5108152cc5b3c63dcf59400f7ba7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAB 10996 bytes

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