Malicious PDF — malware analysis report

Static analysis result for SHA-256 6beb09d6f0efa5f9…

MALICIOUS

PDF

51.1 KB Created: 2020-08-27 19:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c1cff016b2053399d83b9cf9f730394 SHA-1: a112cdbf38918204cb6d3c2c03d69c66b7686742 SHA-256: 6beb09d6f0efa5f9f4636564fc349b9b0e6ff7bce4c2e02e5980597a7c99a60d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to academic subjects and includes the malicious URL, suggesting a lure to trick users into clicking. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=9.s%2525C4%2525B1n%2525C4%2525B1f+denklemler+ve+e%2525C5%25259Fitsizlikler+%2525C3%2525A7%2525C3%2525B6z%2525C3%2525BCml%2525C3%2525BC+sorular
    • http://sebotokid.streettattooevents.com/uploads/1/3/0/7/130775853/tumovazuviziv_nezatobaxigas_jidomomebusazem.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9567/7346/files/underworld_meg_cabot.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/25280710127.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/eero_wired_backhaul.pdf
    • https://cdn.shopify.com/s/files/1/0433/3318/9800/files/tidikozodovabut.pdf
    • https://cdn.shopify.com/s/files/1/0434/0206/8131/files/80143894217.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/sifadegula.pdf
    • https://cdn.shopify.com/s/files/1/0461/9380/3415/files/bosch_washing_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/28835741089.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/android_studio_connect_device_via_usb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/61748676159.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/gatovos.pdf
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/eukaryotic_chromosome_structure_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/creational_patterns.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_off00006671.bin
bd73147fff7bdc501a51b3dc77b9d967de585b604a7c7477736572184d7b8f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 2860 bytes
font_01_sfnt_off00007089.bin
61220a0dae34d1298b72f9dc29e84aaedfd295c424e610d0b93cf322ab2cb80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7089 1768 bytes
font_02_sfnt_off00007930.bin
bfb4daf49227d06c52df1585f1217ab4df269eda71c25fb88decb7cfc03929dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 6040 bytes
font_03_sfnt_off00008c7a.bin
5d94da9a85fff90e4b93634bb812dfc0f5012f0808840f9c18a1ab0d0c8e38d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7A 15508 bytes

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