Malicious PDF — malware analysis report

Static analysis result for SHA-256 db359c836e0aaa12…

MALICIOUS

PDF

56.9 KB Created: 2020-09-01 00:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36bf12c1ee715222458c477908856ce3 SHA-1: 893eb61ff49fd8b41faca4f7bc616e9ef35d838f SHA-256: db359c836e0aaa124b374b60315e4f4cfd49fb4536c3209336240e3592f5865c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a significant number of embedded links, identified as a link farm. The primary malicious URL, 'https://ttraff.ru/wix?keyword=traffic+report+m62+now', is linked from within the document body. Many other links point to Shopify domains, suggesting a coordinated effort to distribute malicious content or traffic. The ML classifier 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/wix?keyword=traffic+report+m62+now
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/aws_elastic_beanstalk_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0440/1509/1870/files/61593529165.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/the_long_and_winding_road_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/ms_271_farm_boss_amazon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/demoxenubunadatifapixona.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/wintercroft_masks_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/gigezofubuwofuseloponu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/13686229643.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/rexevebekatomulijufamuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/area_of_shaded_region_rectangle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/55767534369.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/mixezizegefaredot.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bc0d304f2534ce2b8950baf88f97989.pdf
    • https://static.usrfiles.com/ugd/cec570_ec21d37ba4a14c67ae202fd88b9dcd0d.pdf
    • https://static.usrfiles.com/ugd/3d0627_8b08267d7e0542a8804b309528edd959.pdf
    • https://static.usrfiles.com/ugd/10e3af_c7bdfc3772ca48ac977924816a0e94af.pdf
    • https://static.usrfiles.com/ugd/122077_feffd0fba6594cae9303a7f40782c15f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ba7.bin
bac93685309e3a9c8b51f758c218b08eb8ccf5c096fdaad044eda1233ec1e5cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA7 5276 bytes
font_01_sfnt_off0000ad9c.bin
8541565a51136bf2cee726c4b7d7c1a2c452bf7116717174d3fe464b1c1e50c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9C 13160 bytes

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