Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac89b4807af7b1fe…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 14:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ca979e53237a584ccf5ddbfc0ca2ae2 SHA-1: bed7ed435788f81500e2054758583d61cddf9964 SHA-256: ac89b4807af7b1fe81a5aefbc041e3e7c4829063a96c9fb27f5245e7e2521c1d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=vidmate+apk+2019+version'. The document body also contains this URL and mentions 'Vidmate apk 2019 version', suggesting a lure to download potentially unwanted or malicious software. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify domains, though the primary malicious link is the redirector.

Heuristics 3

  • 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.
  • 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.club/wix?keyword=vidmate+apk+2019+version
    • https://static.usrfiles.com/ugd/493135_0fc5e36425354c1785e28c9f26f86778.pdf
    • https://static.usrfiles.com/ugd/d3758e_8053244ac753439eb786ea786a45d758.pdf
    • https://static.usrfiles.com/ugd/7198c1_b7224fb61c2e4a98b62d6347c214ac11.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/download_un_biologi_sma_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/manumutusolosikotenadiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67062005494.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/excel_macro_worksheet_range_select.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/maria_magdalena_ana_catalina_emmerick.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/lepukigamuvokuripixij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/sulerunoligedukorexata.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/tai_chi_moves_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/choices_hack_tool_apk.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_off00006523.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 2952 bytes
font_01_sfnt_off00006fb1.bin
c7ad68babdf1945b6a3a35d6396aa7e20c5130e2bfaca5b9cb916f504699e0bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 5644 bytes
font_02_sfnt_off000082db.bin
9a940367178a437d1f802ab297d348d2dedc52272bf945dd35ebb2fb310acd73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DB 10516 bytes

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