Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be154861a9af2b8…

MALICIOUS

PDF

33.1 KB Created: 2020-08-22 00:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66c1b294a289fecd6c0d1968d79cb25d SHA-1: efff1194df3eff6b85440fa169f6a034d8cf68fe SHA-256: 4be154861a9af2b8a7f0479633f4436c6f622bbe93f167470855cef6a90a049b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers this redirection. This suggests the document is designed to trick users into visiting a malicious website by presenting it as educational material.

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=exploring+waves+physics+classroom+answers
    • http://files.sugarhillumctexarkana.com/uploads/1/3/0/8/130813821/f48d9.pdf
    • http://lezizo.maranathabiblens.com/uploads/1/3/0/7/130776132/4893919.pdf
    • http://files.contemporaryislam.org/uploads/1/3/1/1/131163898/7d1e98f4987.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/99297414433.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/20644260886.pdf
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/34172766956.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/aceites_esenciales_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/fury_warrior_bis_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/padadikik.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/wumen.pdf
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/88930761432.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/arithmetical_reasoning_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/world_or_warcraft_monopoly.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_off000045ad.bin
27c7f514bbff88696ec1c3c9665ace90f93c537ce7cde8ed19c48c6e757a6396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45AD 5624 bytes
font_01_sfnt_off000058c5.bin
3dcc6f253ea05b8419a6f78e7d3967ba450577d9af9f78f06fdce0513a9e4632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C5 9068 bytes

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