Malicious PDF — malware analysis report

Static analysis result for SHA-256 313a1f7a58aee915…

MALICIOUS

PDF

43.7 KB Created: 2020-07-30 15:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b42c219af5e993ee8ed3961e82c2cf0 SHA-1: cabd3d82f4dfed8ebec56fae1731e503d223eeb8 SHA-256: 313a1f7a58aee915c1f04413d7f73730409d3aa6da63a7f580c73ec989ff4163
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link points to a known malicious redirector, ttraff.com, which is likely used to obscure the ultimate malicious destination. The document body, though heavily obfuscated, suggests a lure related to educational content.

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=math+worksheet+for+class+2+pdf
    • http://files.hartglam.com/uploads/1/3/0/7/130739601/pulaxake_fugafumopubina_komopukufabo_samug.pdf
    • http://files.sspmt.com/uploads/1/3/0/7/130775245/e466bec1.pdf
    • http://files.linda-daunter.uk/uploads/1/3/2/7/132741194/7033172.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/22542469070.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/nigejalubinizipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/xezolubejijon.pdf
    • https://cdn.shopify.com/s/files/1/0435/4437/9546/files/puwanixotomog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nozawilod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/72479102882.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/xikawozedo.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_off00006dd8.bin
23dfe9bb69858c926f49ca02d70e0214f41aa258aadc1f2981925ca7be9c53b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 5172 bytes
font_01_sfnt_off00007fa0.bin
3e8ae024ec0c1442e4441d83a5ee50543d56498735c2a8ad6e88eb56bd47ed7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 10084 bytes

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