Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d0a5860469fa2e…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 23:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31d51883105c5ba155f9f13fe57cda2d SHA-1: e91efecfb25d45ee30f2081a79031b70a2673840 SHA-256: 87d0a5860469fa2ec3099c91b6dc88ca14f341eedfb3913d7b67eac0fd219b15
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The document body itself contains the URL 'https://ttraff.com/wix?keyword=fruits+with+seeds+or+pits+answer', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

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/wix?keyword=fruits+with+seeds+or+pits+answer
    • https://static.usrfiles.com/ugd/565485_d1380069309d42a797d8539f7c88ed01.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1e65132d22e40e49b5d033b17b4eb19.pdf
    • https://static.usrfiles.com/ugd/b58d21_4333236e206943bea1862074f6416c62.pdf
    • https://cdn.shopify.com/s/files/1/0465/0070/8510/files/35491435361.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/65075204099.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/21475724606.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/runigaresuteludaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3670/files/15925708959.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/jiwirivimo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/51764193855.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/vedic_astrology_book_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/99737386635.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/kraft_music_hall_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/building_dilapidation_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/reading_comprehension_worksheets_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/ritirekete.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_off00006164.bin
016fee7766c78b4e27b6d60014e8b0f15ee5eef2a7b2d8d3f0e7cbd8f770c762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 5060 bytes
font_01_sfnt_off000072a6.bin
ac7ac665121b4b69006f7503da6cebd209917036055faa77e00963b15152944d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 10088 bytes
font_02_sfnt_off0000954c.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x954C 16312 bytes

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