Malicious PDF — malware analysis report

Static analysis result for SHA-256 365d3ef5bed1d1d5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-14 04:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f953a0129d657caf43553025fbd85e55 SHA-1: fd9cc6467b26ca86ad1132b53c17f09541ffcd5e SHA-256: 365d3ef5bed1d1d5f871e5f929b87b0a51eee0412c8387110e1409ed2ce46ba4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=panchayati%20raj%20upsc%20pdf', suggesting a lure to a malicious site. The presence of a link farm and the ML classifier's high confidence further support the malicious classification. The document appears to be a lure to a malicious website, 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.com/wb?keyword=panchayati%20raj%20upsc%20pdf
    • http://files.willowdaleequinecentre.com/uploads/1/3/1/6/131636872/dujevivefopivukita.pdf
    • http://files.lucypole.com/uploads/1/3/1/1/131163516/51df62dd1fb3c.pdf
    • http://files.glennmehrbach.com/uploads/1/3/2/6/132682883/pagamotidujaloxixin.pdf
    • http://xuzusuj.tnccivic.org/uploads/1/3/0/7/130740465/bejamowu-kuvokimobufel.pdf
    • http://files.stephaniebrownscholarshipfoundation.com/uploads/1/3/1/4/131438541/fd09850a.pdf
    • https://cdn.shopify.com/s/files/1/0451/1078/8261/files/stopping_by_woods_on_a_snowy_evening_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/newline_character_in_markdown.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3515/files/59364030005.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/23344554549.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7477/files/is_sirhurt_a_virus.pdf
    • https://cdn.shopify.com/s/files/1/0452/7433/3346/files/electronics_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/bevudefubisenimogati.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/xaxapuweximepasar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/toefl_reading_comprehension_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/6344326545.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/algebra_2_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/14975879452.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/3969057240.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/30466361188.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_off0000768d.bin
54cf338261d78eb69014af93eca6c7d49fc0efd1aa770883d98f0fdde83c924b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768D 5392 bytes
font_01_sfnt_off000088e0.bin
68555477d186323c24d50918f4e54327695203194a4683064d5b7af7a92736e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E0 10504 bytes

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