Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdba15ebf9d2c067…

MALICIOUS

PDF

52.2 KB Created: 2020-08-26 02:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3323e4c5ba0b9a185aaed8c588d201df SHA-1: 182ec6fc83d430d81dbcb4a55312e9eed2b0d72c SHA-256: fdba15ebf9d2c06787cb68671886248f4ea2b67b4adfcf6ff43a9d756ad46f1a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to installing MySQL Workbench and a URL that mirrors the malicious redirector. This suggests a social engineering attack where the PDF masquerades as a helpful document to trick users into visiting a malicious site.

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.ru/pify?keyword=instalar+mysql+workbench+en+windows
    • http://mubonuboz.ohenrymustangband.com/uploads/1/3/0/7/130775934/0e44a.pdf
    • http://files.plitechnologies.com/uploads/1/3/0/7/130739037/5122665.pdf
    • http://mupajilus.marine-ropes.net/uploads/1/3/2/6/132681268/xatafudejelam.pdf
    • http://files.eurounionspokane.com/uploads/1/3/0/9/130969934/zitekukopituxinozes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/pavuniwedinozap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/carpal_tunnel_exercises_aaos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/garfield_and_friends_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/roxunonamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/soxonunaganumoxenuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/traducir_archivos_ingles_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/baxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/87013201901.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/49200392098.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/77576470321.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7333/files/call_of_duty_mobile_beta_apk_data.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/81774249911.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/kuwulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/69004433733.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_off00007ea2.bin
a38a6dbfd0a62333da9af1838dddc04bfb91c5ea0631afef05d292eb3e13f629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA2 5428 bytes
font_01_sfnt_off000090ed.bin
3e62bf1c7008693ad7ed708848b380e26f383e219a3b5e160b83570a7623a091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90ED 10564 bytes
font_02_sfnt_off0000b4de.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DE 4324 bytes

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