Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50c4322a65c7eb9…

MALICIOUS

PDF

77.6 KB Created: 2020-08-08 04:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed69a307fd65f56dc59c4afb971c5a11 SHA-1: 112394737b6f5084ad4e3e0ad8d01dd960913244 SHA-256: e50c4322a65c7eb9556c2da32c922c30f107f90a917bd70680c09248a61cd3c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'catching fire movie script pdf', suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to a malicious URL via the embedded link.

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.com/pify?keyword=catching+fire+movie+script+pdf
    • http://files.rivendellmeadows.com/uploads/1/3/2/8/132814958/zurazaguxofejeja.pdf
    • http://files.knapplandscapearchitecture.com/uploads/1/3/2/7/132712093/9346411.pdf
    • http://files.claretherese.com/uploads/1/3/1/8/131871705/dasida.pdf
    • http://files.rachaeltilly.com/uploads/1/3/2/3/132302992/dutelavemo-supimegufix-duxotere.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/ranamisaravuroberavom.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/rekatufamujesilosajal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/95640629622.pdf
    • https://cdn.shopify.com/s/files/1/0429/6163/3439/files/fugaridowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/simplifying_and_evaluating_algebraic_expressions_worksheets_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/differences_between_business_administration_and_business_management.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/dadugawuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/sapekunon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/xududatewejesuzekex.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/cbse_grade_12_maths_textbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbae.bin
2fd454cb86c9d462f13f34677e75f2df03bfc1cf61bc4be3fe71b79657abbbcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAE 5752 bytes
font_01_sfnt_off0000ef46.bin
9a023b85d9adf1503afff20b2ad0005e4a8e96ca2635534fbdff00213a65e1ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 5504 bytes
font_02_sfnt_off000101dd.bin
476569b984cef0a5fff52119982ac8145bbb99c0adb25b174e15c54249e78c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101DD 10824 bytes

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