Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bda6a5df9e670d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 05:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e507a7bc36b18f50b5d5fc29eddd3fa SHA-1: 8db395c9364d0f0aa6548c90607a97c7a3c766ce SHA-256: 00bda6a5df9e670debe88ceeb47c4c2a3ce13db7c4fe6b1adce4333119b4eb2b
154 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=reboot+stuck+on+powered+by+android+screen'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to the malicious ttraff.ru domain.

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=reboot+stuck+on+powered+by+android+screen
    • http://files.debbyhaskardstrauss.com/uploads/1/3/1/8/131871424/1312976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/53697588967.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/14257784635.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/pdf_marketing_research.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/irithyll_dungeon_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/59063025279.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/nanudezimodajap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/jugideleludofugetiripi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/critical_thinking_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/st_louis_weather_15_day_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/basic_language_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb1.bin
58e5a1e57b9183e9e6f59cf39796067e7c409553e0c8c37064f573b384c7133f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 5440 bytes
font_01_sfnt_off00007255.bin
5953aa8e459bec5ab38792a5919a5a0b3be0644c5d57fed01c0dd63f0b3f8383
pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 10364 bytes