Malicious PDF — malware analysis report

Static analysis result for SHA-256 21392ffe64562925…

MALICIOUS

PDF

44.2 KB Created: 2020-08-09 18:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2d8e0ac83c10372018e6502d997440e SHA-1: 06e17a3b528f9730b8468a7bf6c10987081898f4 SHA-256: 21392ffe64562925dffd1ba6edc73582b39fa22ec83abaf70b8421b9dbd7e024
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external resources, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ernst+cassirer+language+and+myth+pdf', which is flagged as malicious. This suggests the primary intent is to redirect users to malicious sites, likely for phishing or malware distribution.

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=ernst+cassirer+language+and+myth+pdf
    • http://files.wickedsimracing.com/uploads/1/3/0/7/130776327/mumofuwuxote.pdf
    • http://fowusixo.landsendmarinainc.com/uploads/1/3/0/8/130814328/budarura-tukajowesewavex-befikulij-wexasid.pdf
    • http://tuveguk.upscaleresale4kids.com/uploads/1/3/2/8/132814930/leligujozix.pdf
    • http://files.montessori-mag.org/uploads/1/3/1/4/131407061/toroje.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/como_descargar_mi_certificado_de_secundaria_en.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/mufasukomemuzusudovuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/alyssa_carson_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/valototaxetub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/super_paper_mario_wii_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/simple_present_exercises_cambridge.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/75030036002.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/dotuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/ecological_study.pdf
    • https://cdn.shopify.com/s/files/1/0440/5159/5429/files/calligrapher_s_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/2007_yamaha_virago_250.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/wunesufolute.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/ziguvew.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/ruwapezep.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_off00006162.bin
66854ed246f3dc0659aeb8ed6aae8bee352f4206b348400c3e1369c46256dbbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 5400 bytes
font_01_sfnt_off00007390.bin
9a82aebfed440a7235edaa8be01d8ccb4ec5c68f862bb8338c1f94ecdbf1d338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 9952 bytes
font_02_sfnt_off0000959b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x959B 4324 bytes

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