Malicious PDF — malware analysis report

Static analysis result for SHA-256 e385b24d68dbfe36…

MALICIOUS

PDF

37.8 KB Created: 2020-08-27 22:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1242f1ee4868527c2432bafa519c61d3 SHA-1: 14e69ab05762feaec2d4947f57bad45e27f4c766 SHA-256: e385b24d68dbfe36b8f5c24461ac272a165b3e7cdcc00bc8ce3e2e1c504ac906
152 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 `https://ttraff.me/pify?keyword=kinetic+and+potential+energy+worksheet+answer+key`. This URL is embedded within the document body, suggesting a lure to trick users into clicking it. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/pify?keyword=kinetic+and+potential+energy+worksheet+answer+key
    • http://files.shirazgermanshepherds.com/uploads/1/3/0/7/130776142/fe52ea1.pdf
    • http://files.pasadenamasoniclodge1155.org/uploads/1/3/1/8/131857445/mumegalozopaviv.pdf
    • http://files.sharpearedowl.com/uploads/1/3/1/1/131163782/9452167.pdf
    • http://files.scottwhitworthphotography.com/uploads/1/3/2/6/132683330/mevidipow-jugovomifodoz-kakubufalir.pdf
    • http://files.p-l-a-i-d.net/uploads/1/3/2/7/132712676/31bcf78f.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/27184308505.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/micros_9700_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/57630151652.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/jobuxezen.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/ab-_soul_control_system_zip.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/45451634336.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/fozofipetazefipusafozez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2411/3049/files/rise_of_the_tomb_raider_launcher_download.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_off0000566d.bin
70b36d74f38064b85dcd3d81c859e3507213c8a3cc44ebc22f022d990204bf03
pdf-font-stream PDF embedded font (sfnt) at offset 0x566D 5564 bytes
font_01_sfnt_off0000695c.bin
008eb5494828fdaea99dbf7526441eda1be30b35552d50327a9c2739848edbc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x695C 9628 bytes