Malicious PDF — malware analysis report

Static analysis result for SHA-256 9066a688d17c8231…

MALICIOUS

PDF

58.9 KB Created: 2020-08-24 02:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a838934e554d435fe864f6006d2b81b SHA-1: 706ac1aafe6d72874862b257319ce50e7b7960a0 SHA-256: 9066a688d17c82316ee55db0f4936ffcc43202060a81b6b784992064c116d02e
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL 'https://ttraff.cc/pify?keyword=after+effects+tutorials+in+tamil+pdf' is a key indicator of this redirection. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to download further malicious content.

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.cc/pify?keyword=after+effects+tutorials+in+tamil+pdf
    • http://files.ccsprings.com/uploads/1/3/0/8/130874526/2444b80c7b.pdf
    • http://files.kristasharmonymusicstudio.ca/uploads/1/3/1/4/131482941/padutanele.pdf
    • http://files.patersonsland.co.uk/uploads/1/3/2/3/132303238/gumuketonowusex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/delta_sigma_theta_achievement_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/avd_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/wijawedavad.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/36929516312.pdf
    • https://cdn.shopify.com/s/files/1/0428/3455/9143/files/treatment_for_antisocial_personality_disorder.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/boron_family_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0444/1505/8086/files/what_is_an_example_of_a_subtitle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/automatismos_industriales_editex_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/fumunanu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/diberidavulosunuziwipuk.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_off00009207.bin
48ebb636c46b2b09d69457173d63928bb701da7750cac34dc2c013e9df30dd58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9207 5288 bytes
font_01_sfnt_off0000a3ef.bin
2b6f6a2fb2855c9df18ec48d2b4cfe740a422c8e908475697e5ff3497fd20088		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3EF 10848 bytes
font_02_sfnt_off0000c908.bin
a39056ceb67e0f692823e2bfa14381fc6a83c992cc87368c94e015e86c1431f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC908 16168 bytes

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