Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d31027d098d34e4…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 03:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb00e40c43d990f3de3a624cdd2109eb SHA-1: db2ca2bb7623b5cef4cbeb0359b0857eba55353e SHA-256: 5d31027d098d34e409fb036dd511ace083e2eceb8e94cf4a39b71ac869010d8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to chemistry laws and the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. The presence of embedded URLs and the redirection heuristic strongly indicate an attempt to lead the user to a malicious 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.ru/wix?keyword=kimyan%25C4%25B1n+temel+kanunlar%25C4%25B1+konu+anlat%25C4%25B1m%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/kayle_build_s6.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/55820494581.pdf
    • https://cdn.shopify.com/s/files/1/0433/7549/3271/files/61312797009.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/ruwepil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/46142945476.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/xabateloxeguneluxabawumas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/88755535567.pdf
    • https://static.usrfiles.com/ugd/b8c837_1225a9ef6b364cad995240a823b438a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e21ac01d42b1456f88727182eb37006b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef3ce485d6de47268a4e9a7bbb992ec6.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2089/files/blackberry_10_launcher_for_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/jomopapozulewetadevadupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8679/7213/files/37809048467.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/ny_times_crossword_answers_8_23_19.pdf
    • https://cdn.shopify.com/s/files/1/0451/1747/2922/files/laryngeal_mask_airway_clinical_guidelines.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642c.bin
97560ea701d480278f5160e3bc33b12ae9d8068c721827351261d2cd488cf2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 3184 bytes
font_01_sfnt_off00006f81.bin
7c4782bc0db324736890d94423fa23da52a2e3c55a9cbbaa256843d4dbd2e916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 4820 bytes
font_02_sfnt_off00007fc6.bin
fcfb8f0e55ad9df5a1ad0726378e3a06894f11344b8aecece3a66ee94f149217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC6 2252 bytes
font_03_sfnt_off0000892c.bin
ee5cb58c1a208267140094782eaba080fb59c1e556bdfc62c628c2f206a46dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 11656 bytes

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