Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2858e2c83ae46d0…

MALICIOUS

PDF

47.5 KB Created: 2020-08-05 08:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67ed09be82d79ad332e90c706da34509 SHA-1: 40f8f52191faa71b54f72e53d04e95ef72ff0372 SHA-256: a2858e2c83ae46d091c4f37d18abac619ee6c954d7c70d3b0d29a2a20b6b3874
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for phishing or malware distribution. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'basic electronics notes' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious nature of the document.

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=basic+electronics+notes+for+first+year+engineering+pdf
    • http://files.nuimagedesigns.com/uploads/1/3/2/6/132682930/6978422.pdf
    • http://files.timberlinechristmas.ca/uploads/1/3/0/7/130776661/6ee87c537c06d.pdf
    • http://files.lanteahouse.com/uploads/1/3/0/9/130969922/suxes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/nrsv_with_apocrypha.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/1664027787.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/69845261404.pdf
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/modifegagaputisamiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/baxaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/1538806589.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/67468619612.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/michigan_medicaid_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/54236060237.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/37426817200.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/deposoweda.pdf
    • https://cdn.shopify.com/s/files/1/0432/4481/4500/files/febajaburodavokajonevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/xudaganer.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_off00007285.bin
84ead1a7e64264c9083138d5434308738598317062d49608f0af43f8aa87f4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7285 5476 bytes
font_01_sfnt_off0000853d.bin
dc5adccb7082cc4edc6ac8941dccd1b50adecabbda488ac9de25542fd301057e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853D 13476 bytes

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