Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a4705e72c862ef…

MALICIOUS

PDF

46.6 KB Created: 2020-08-02 04:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04fc9c5727918b5547a592a7db3a30db SHA-1: 041dc50526e43a0c396cc7cb246461ffa10ea74f SHA-256: 50a4705e72c862efe54f535224e1630941a87ace47d90c15fe24e963973a29b8
150 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, pointing to 'ttraff.ru'. This URL is designed to redirect users to other content, likely malicious. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on Shopify, suggesting a link farm or redirection scheme. The presence of numerous embedded URLs, many pointing to Shopify, further supports the idea of a link farm used to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=american+electricians+handbook+16th+edition+pdf
    • http://files.zenmethodhuntsville.com/uploads/1/3/2/3/132303229/3983923.pdf
    • http://files.espartana.com.pt/uploads/1/3/2/6/132681409/kebebizolex.pdf
    • http://files.gricua.net/uploads/1/3/0/9/130969080/682eb18a31b.pdf
    • http://files.elmcreeklonghorns.com/uploads/1/3/0/8/130874646/juxugox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/45557354748.pdf
    • https://cdn.shopify.com/s/files/1/0430/8988/7396/files/kesorenajezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/65491078455.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/tipujijepelagavubowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2934473971.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/windows_xp_service_pack_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1587/files/kusivex.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/jebokenezuduzisakeloxov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/diamond_video_capture_vc500.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/kajawisefowewemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/80327122486.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/besojekopelemiti.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/rabaxaxibibamon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9601/5002/files/pifabiwexe.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_off00006806.bin
d75d0d48413e3545a48c3371c89e82b135d3354e92aa930919c7e7aeea425482
pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 5796 bytes
font_01_sfnt_off00007b8e.bin
4c070162644ac8ac3ff4c8230dfbec65d4990a3a44a35c971aea61e5bbe5fd27
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8E 16076 bytes