Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f3cc9078a81d99…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 13:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced3fcfd6a9c2a66a195c1c07fd5b2fd SHA-1: 39fb2a4392c633da67619523b60f4a1b3be9ce73 SHA-256: 86f3cc9078a81d99a6d9539b715deef7ee71075c2ca6bf0920e39ea798529344
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'convert pdf to jpg online free' and the malicious URL, suggesting a lure to a malicious site. The presence of a 'download button' heuristic further supports a social engineering attack.

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=convert+pdf+to+jpg+online+free
    • http://files.rosevilleacupunctureandmassage.com/uploads/1/3/0/8/130814926/25d6afd7.pdf
    • http://files.musiclink808.com/uploads/1/3/2/6/132695384/49e1d.pdf
    • http://files.arisecoalition.org/uploads/1/3/0/9/130969478/vexug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/65404290350.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/ernest_cline_armada.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/nokelepunuzonidavipakikef.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/tagalog_to_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/54035420651.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/87466292481.pdf
    • https://cdn.shopify.com/s/files/1/0444/5965/5335/files/most_important_banking_awareness_questions.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/adeptus_custodes_rules.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/63362624425.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1903/files/3841961332.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/menatejivuso.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_off00006857.bin
4396cd614e6de2f2072a72661db12b94db2a9948b04d71718c63e24c9d63fc38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6857 4860 bytes
font_01_sfnt_off00007905.bin
cb2bd6f23bbbf0f22bd404378829021256641b66f0efd5a00574011151668b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7905 10052 bytes

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