Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e296a0900cf3624…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 03:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06299940ef9662e875508ce6e7364ba8 SHA-1: de7e6f42861300be9be2a93998a5ca66fc291fdc SHA-256: 6e296a0900cf36246c11a461a37c655cc813f809c12dbc6e99ee7ff1b7cce1ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, likely to facilitate the download of further malware. The document body and heuristics indicate a lure for free downloads, specifically mentioning 'business administration pdf free download'. The presence of numerous links, many pointing to file hosting services, suggests a link farm designed to attract users seeking content, with at least one link identified as a malicious redirector.

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.cc/pify?keyword=business+administration+pdf+free+download
    • http://files.gracelaneboutique.com/uploads/1/3/1/4/131452988/sogulinujotam_xukufukunolimo.pdf
    • http://kemax.allthingsclown.com/uploads/1/3/1/6/131636664/247465f6.pdf
    • http://files.wsbra2020.com/uploads/1/3/1/8/131871699/951c9012ea.pdf
    • http://files.harlowrockschool.com/uploads/1/3/0/8/130874510/4536296.pdf
    • http://files.tangns.ie/uploads/1/3/1/4/131406149/8aa58bd5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/widobonikutolix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3531/1775/files/jewifisom.pdf
    • https://cdn.shopify.com/s/files/1/0436/5022/0185/files/twilight_graphic_novel_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/87507745267.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/vuzuzuboxeloxuzifeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/33808586211.pdf
    • https://cdn.shopify.com/s/files/1/0433/5065/5129/files/40040174304.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/15283975885.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/93494387254.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41078692832.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006463.bin
556f877d060abcadbe338d8e62692199d1484569ac724cf6f3490d176e38b219
pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 5328 bytes
font_01_sfnt_off0000767f.bin
a182de83ba8052eb3d9016964178f7dfd62726d76bc60199e13bb576240c0d84
pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 10924 bytes