Malicious PDF — malware analysis report

Static analysis result for SHA-256 606e903607b5dd54…

MALICIOUS

PDF

67.7 KB Created: 2020-08-23 02:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543bb3900f3481e5ce4e7760d4ee6660 SHA-1: 2feb3ebe39aca2d86e392f0b92ee644b70815aa8 SHA-256: 606e903607b5dd54c7bb2cf996072a14f042b6ed77d54bae1dea8854a0b6c2ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Platform bed base with drawers' and the malicious URL. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=platform+bed+base+with+drawers
    • http://files.allensinor.com/uploads/1/3/1/8/131856574/0662143d1f.pdf
    • http://wetovorit.elliseffect.com/uploads/1/3/0/7/130775209/3069555.pdf
    • http://files.eastsidefoodforthought.com/uploads/1/3/1/6/131606819/4873996.pdf
    • http://files.illinoisdelta.org/uploads/1/3/2/6/132681938/2186787.pdf
    • http://mumiko.justicecollaborativeatcornell.com/uploads/1/3/2/7/132740836/romososo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/latest_android_version_names.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/ember_tetra_care_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/aula_internacional_1_new_edition_vk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/benanazesaredavajub.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/47392284470.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/cookie_clicker_save_files.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/muposiwilefukunisamasox.pdf
    • https://cdn.shopify.com/s/files/1/0433/4216/8218/files/selubumolifumeliropotixu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/45636382250.pdf
    • https://cdn.shopify.com/s/files/1/0431/4959/0690/files/carmen_overture_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/27565666534.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.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_off0000ccea.bin
f2a4f175a1519a8994df36552ab265bb851003ec87d525261fddf98ad7e22805		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 5380 bytes
font_01_sfnt_off0000df1c.bin
95f54c1bd54703352dd90804e67afaa2ff354bbf7c50aa986ae65b6c5b74b3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 10072 bytes

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