Malicious PDF — malware analysis report

Static analysis result for SHA-256 854ec1172f8ebd54…

MALICIOUS

PDF

48.2 KB Created: 2020-08-04 04:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5442d04ce5f7659efd1385b885371757 SHA-1: 00235d642ac9a49fa02ee478a363e538d7cb9c79 SHA-256: 854ec1172f8ebd54c40a97ca49468b786244fe73eac312dbab885cb240cb0f81
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=equilibrium+chemistry+notes+pdf'. This suggests the document's primary purpose is to redirect users to potentially malicious content through a chain of links.

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.com/pify?keyword=equilibrium+chemistry+notes+pdf
    • http://files.allstarfiling.com/uploads/1/3/1/8/131856392/1892805.pdf
    • http://files.whiteheatfashion.com/uploads/1/3/0/8/130874281/d3e7bcbd.pdf
    • http://files.sarahgadd.com/uploads/1/3/1/4/131407980/julagena.pdf
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/vekazox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/poleregenonudem.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/96009023217.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/93377212117.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/weather_in_newark_de_19711.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/donemezotilewalofidal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23651487672.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/51678649680.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/tinujuwupofalizobim.pdf
    • https://cdn.shopify.com/s/files/1/0437/8814/0696/files/96832889083.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1272/files/operation_management_krajewski.pdf
    • https://cdn.shopify.com/s/files/1/0437/1067/7141/files/markers_infowindow_google_maps.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066cf.bin
2e4eaf1815ce1a0e2f00355f93fa0630d7c1464785c44b812a3bdab910ea8614
pdf-font-stream PDF embedded font (sfnt) at offset 0x66CF 5512 bytes
font_01_sfnt_off00007969.bin
76450e901b66dcbfa7c5fe44dbb7a7dea95fd81e5293de2da344260338586d95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 10336 bytes
font_02_sfnt_off00009cb3.bin
d44d52ef66720e7299aa23375668eb807971917d9a72a2eac4a2c392e38f6666
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB3 16128 bytes