Malicious PDF — malware analysis report

Static analysis result for SHA-256 e797bd24039cab24…

MALICIOUS

PDF

41.3 KB Created: 2020-08-24 03:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01a582c9f5ace9b07ad25d9489bea03 SHA-1: 65f2f9fa51a418cbb8a2cd401a3dada84fcb4ced SHA-256: e797bd24039cab24111a0feae3699c4580af590bcc154929c7f0a7f5cf6693f3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a "day of the dead coloring worksheet" and the malicious URL. This suggests a social engineering lure to drive traffic to the redirector, which likely serves a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=day+of+the+dead+coloring+worksheet
    • http://files.volareresorts.com/uploads/1/3/2/3/132303023/kirolemuvowelor.pdf
    • http://files.969theoasis.com/uploads/1/3/1/4/131437554/6494762.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/sesof.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/14963314741.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/nurepepumijife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9452/4579/files/61026399287.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/dulunifiwuxotolakezulozit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/95043010794.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/sizosijixewilamos.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/vuwakewaxonaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/pimevufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/ishikawa_cause_and_effect_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/falatasej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/wedumariwalarivum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/fikisef.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_off000062cf.bin
0ec7f38f972ab78934805b74e4755f12633d86bcfe995310856442cee69d3135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 5540 bytes
font_01_sfnt_off000075bf.bin
0b5b4b4b2c6478e3618abf2db13f9a13c5f8794b10dc2daa0c10b1768cd3c2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BF 10192 bytes

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