Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b1f4cb802b3300…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 14:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02d18f79c02d451fc5c36a26c0ada5d SHA-1: 60d5b3d84c767a02a8932041ede750bd9f9a6199 SHA-256: e0b1f4cb802b33002abb231871cbdce815f82432c12c2064a118b57dc3b2aaeb
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated, but the presence of numerous external links, including one to a malicious redirector, suggests an attempt to lure users to malicious sites or to manipulate search engine rankings with low-quality content. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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=off+road+car+racing+games
    • http://tugajepid.tomorrowlandtshirtauthority.com/uploads/1/3/1/6/131606739/mogatilidiposis-pixorofazod.pdf
    • http://files.creationjustice.org/uploads/1/3/1/3/131382274/9755280.pdf
    • http://files.paulharringtonpoetrysite.com/uploads/1/3/0/8/130813378/fofozetalemo.pdf
    • http://wegesi.sharpeningonsite.com/uploads/1/3/0/7/130776334/senodufezo_revalu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/grandstream_ucm_6208_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/xuxikinipuwuneperepuvone.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/jump_math_grade_3_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/98319823182.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/21070984423.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/bams_course_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/50328159994.pdf
    • https://cdn.shopify.com/s/files/1/0443/9543/0054/files/acca_f5_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0444/6637/2775/files/best_answers_to_202_job_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/4941/0979/files/losilavanekesakumura.pdf
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/fimuxamezitukufububuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/11702767629.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/vanimekabunopove.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068eb.bin
bed2968e2f595e7db187547d89077be0362a7f98a6af563615eb05e9f79f3acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EB 5336 bytes
font_01_sfnt_off00007af7.bin
8003e8fc1d38559cfefcad3bf1738de0e84f44f712cc8b184ccc8d19e843c268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 10112 bytes

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