Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e88b2d933d88c8…

MALICIOUS

PDF

55.1 KB Created: 2020-08-23 15:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d2c0b0f376d74278a0379b224726aa SHA-1: eb0427d035a0d9e82f3987b5cfb09e6a25c75fb3 SHA-256: 34e88b2d933d88c8ffa7f842e69dc048548bc27e4cb3602b0c8e63828325d71b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm designed to appear as legitimate application forms. The primary link, 'https://ttraff.com/pify?keyword=kal+boishakhi+song', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this malicious URL, indicating the intent to redirect users to a harmful 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.com/pify?keyword=kal+boishakhi+song
    • http://xuvopifa.thehockeyprofessor.org/uploads/1/3/0/8/130874426/lijulamuzo_dakow.pdf
    • http://files.leeannhorrillcounselling.com/uploads/1/3/1/3/131398479/nudofovat-welovujopatet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/application_form_scheduled_caste_certificate_west_bengal.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/administrative_law_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/what_is_snooze_in_gmail.pdf
    • https://cdn.shopify.com/s/files/1/0451/8913/6533/files/nifulamalukow.pdf
    • https://cdn.shopify.com/s/files/1/0459/8523/5111/files/mysql_database_for_visual_studio_2010.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/57091247417.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/25511893662.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/mazixadisedov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/32474740983.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/litokukixukebafigop.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/magova.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006924.bin
cd751861d2c492ff2b68d1af57666d459a4478a858b27df81afe9a23dadda8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 4612 bytes
font_01_sfnt_off000078a6.bin
1159a76b1d582bf9560afb414b5e248ab71b8fd7037abf5fb1678e1598ac18ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A6 8900 bytes
font_02_sfnt_off000095aa.bin
ea6f03578f593211adf898c28a14b139ff21476827ed35df65581017e3bb867a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AA 14152 bytes
font_03_sfnt_off0000c181.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 4324 bytes

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