Malicious PDF — malware analysis report

Static analysis result for SHA-256 51720944e1783ece…

MALICIOUS

PDF

43.4 KB Created: 2020-08-05 04:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48e3b6d1543e2f02b72228867ca2843e SHA-1: 9c1a4d2f4599198d99710dbb5adcac59a23423ce SHA-256: 51720944e1783ece89aa82cfc66d03ec4de01aa4d4c62827fedefb48c266f581
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating that at least one URL, https://ttraff.cc/pify?keyword=because+beatles+pdf, leads to known malicious redirector infrastructure. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass external PDF link farm, with many links pointing to shopify.com domains. The document body is largely unreadable binary data, but the presence of the malicious redirector URL suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware distribution.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=because+beatles+pdf
    • http://files.artbyamandahorn.com/uploads/1/3/1/4/131437056/ed39a7.pdf
    • http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdf
    • http://files.greengodsgrow.com/uploads/1/3/0/8/130874642/jewumadupiwipavisoxo.pdf
    • http://files.papasconstruction.com/uploads/1/3/1/4/131406105/2265d.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/57407558006.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/introduccion_de_la_contaminacion_del_aire.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/morijomalenon.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/43515125666.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/16919761090.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/wodakoreborisugovaxirun.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/46598320855.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/69247130210.pdf
    • https://cdn.shopify.com/s/files/1/0438/7209/2315/files/3973722333.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/denixuwokeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/77363792398.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/80504255547.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/potabamusedugolixo.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_off00006cde.bin
b0226944c8eeac779fad231013d464087e44384648f7fd25a57e7490013095ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 5244 bytes
font_01_sfnt_off00007ec1.bin
efa88917c59aecabd1a88ebbe391a2dca5fdf0f77bf6f82f94c8eadc0de82698
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 10040 bytes