Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e711ba5fb1cb40f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 02:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff838a1d8ab15916efa24567fea3d580 SHA-1: c356a491b4fcce827a39d0bda7a5b068efca0427 SHA-256: 8e711ba5fb1cb40f27783768ebc50906b212d84db5361edc5bb930d04e2a3060
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links directs to a known malicious redirector service, ttraff.cc, which is likely used to obfuscate the ultimate destination of the attack. The presence of numerous links, many pointing to Shopify domains, suggests an attempt to manipulate search engine results or to host a large number of lures. No scripts were extracted, and the document body was largely unreadable binary data, but the heuristic firings strongly indicate a malicious redirection scheme.

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.cc/pify?keyword=piscatoris+hunter+area
    • http://files.amycvena.com/uploads/1/3/1/3/131380951/xowojeno_fakumelof_xafexixumagil_degosemo.pdf
    • http://gufig.promolusitano.com/uploads/1/3/1/0/131070476/nogolexog.pdf
    • http://files.aprilklasenauthor.com/uploads/1/3/2/7/132712483/gujadif-xolukejevuvi-pibubixowivuduj.pdf
    • http://files.thesoulsalchemy.com/uploads/1/3/0/8/130814687/gonuror_jelegusugajo_gujisanolose_pugijuzepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/katepifutesemupoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/19993746760.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/74239689393.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/4042206946.pdf
    • https://cdn.shopify.com/s/files/1/0428/9062/5191/files/fikimagalebub.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/uninstall_node._js_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/sibiwuras.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/xfinity_uc_davis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/96378147976.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nozawilod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.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_off000068a4.bin
3e5913c8199d2f91d3c63c36b6c31d4209a5f4e1266bb6415f94abe4a6dde8b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A4 4856 bytes
font_01_sfnt_off00007921.bin
554a852ed8d5c28a1e1acd6c34dd544969741c5a061797968578111bf8daa716
pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 10064 bytes