Malicious PDF — malware analysis report

Static analysis result for SHA-256 8263c8716efae388…

MALICIOUS

PDF

40.7 KB Created: 2020-08-03 21:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb9d941d6c6451e90d1924c9bc2479c6 SHA-1: 9c2508334d6b09d5f866a6d10963b0da5d345773 SHA-256: 8263c8716efae38877f14ce29c3c46adc6476643cf2eccaabf002c4763e4c28c
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=e.+coli+pdf+download', suggesting a lure to download content. The presence of a 'download button' heuristic further supports this. The file likely serves as a dropper or redirector to malicious content.

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.cc/pify?keyword=e.+coli+pdf+download
    • http://files.manasiev-art.shop/uploads/1/3/0/9/130969791/lopixekepevesa-xizal-lewunitizaw.pdf
    • http://files.partnerstkd.com/uploads/1/3/2/6/132682171/8879954.pdf
    • http://files.candacesam.com/uploads/1/3/1/1/131164027/misexalupip.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/minecraft_dragons_breath.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1285/files/28056144325.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/xajaxitutexeduv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/75051367967.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/vojuluvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/91910664106.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/8241624184.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/womij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/82760785578.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/megoxidojixugapilanaseg.pdf
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/28810045754.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/60554123104.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/48869569121.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_off000061bf.bin
748b57a81209ab83c66a4f6bc9e7897cf5900d7376e2c1b6b0a6c4d99e897d78
pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 4956 bytes
font_01_sfnt_off000072d3.bin
fb789a54431601ad2620bc298b3e87f71fd8af84222b5be271a15460f16da3c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 10356 bytes