Malicious PDF — malware analysis report

Static analysis result for SHA-256 584ca2cc34a37003…

MALICIOUS

PDF

38.7 KB Created: 2020-08-05 16:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ceb0d3aa80eb194bf9096a39aac371c SHA-1: 543ae36851ce5c62260fc34b3993d7c71b24b02a SHA-256: 584ca2cc34a37003872ff95453e0923923b1857aae897fbbef35a6aff4e38e68
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to domains associated with link farms and redirectors, such as 'ttraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external links were generated, likely to manipulate search engine results or distribute malicious content. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=partnership+agreement+example+pdf
    • http://files.ipe-pain.com/uploads/1/3/0/7/130775310/533208.pdf
    • http://files.sarahelizakelly.co.uk/uploads/1/3/2/6/132683017/revedodagunirox.pdf
    • http://files.servingwithjoyhealer.com/uploads/1/3/0/9/130969740/b70171f50ff0.pdf
    • http://files.arnoldroad.org/uploads/1/3/2/7/132740763/5292589.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/calculus_early_transcendentals_briggs_cochran.pdf
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/7486773930.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/vanafisetopuxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/tovodub.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/attachment_theory_adults.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/70069459474.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/jifufirawozir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/pesigidalilakevigaxupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6825/files/vowewowibeninole.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_off00005a61.bin
a9bdedc1389456560c23d66a4a83f00490091c397264aee77a739b87a3867e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A61 5524 bytes
font_01_sfnt_off00006d0b.bin
0f8e547583ca5383aeedad7a1e50a0f04410cfbfb727f12841f278204b4be930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 9728 bytes

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