Malicious PDF — malware analysis report

Static analysis result for SHA-256 436d8dcf49a06529…

MALICIOUS

PDF

33.3 KB Created: 2020-08-06 03:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5385ccbc96da6cca6bd757011560d23c SHA-1: 2fdfce33895ab3e67803edbd24cedc4d74a127d1 SHA-256: 436d8dcf49a065291a630210d612520d6f49b78ed075ab1b44b7ab4be306393b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=8th+grade+math+transformations+test+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to various Shopify-hosted PDFs, some of which are marked as confirmed benign, while others remain unknown. The document body is heavily obfuscated, but the presence of the malicious redirector URL and the link farm structure strongly suggest a phishing or redirection attempt.

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=8th+grade+math+transformations+test+pdf
    • http://mumemazan.brosforstevenash.com/uploads/1/3/1/4/131453109/zebikugigowa-vitabuwopurima.pdf
    • http://files.elorafaye.com/uploads/1/3/1/6/131637016/zirum-zidugo-tewipirixelir-wipogomibuzeviw.pdf
    • http://files.rosedalecurriculum.com/uploads/1/3/1/1/131164460/farosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/dujenamamibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/dugosabasuxuberuliki.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/65550411291.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/63649714275.pdf
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/xampp_default_mysql_password.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/atresia_esofagica_tipo_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/30395686678.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/walmart_apply_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/25810488249.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/gosexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/84899825875.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/tedalanavodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/zanapupapozilumozofow.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_off000046ab.bin
6da14b89fe4c0184284a50eccb26e62a3c6ea9371a99ba9b820e9f234c963eb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x46AB 5520 bytes
font_01_sfnt_off00005943.bin
20db73468da6cff3b3d3345d38e6a5734199a9b897ad8f2ec863b967f3dde530
pdf-font-stream PDF embedded font (sfnt) at offset 0x5943 9008 bytes