Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43d5145ddf6b5c3…

MALICIOUS

PDF

48.3 KB Created: 2020-08-17 02:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 605d830408ef040633ce5078e554feee SHA-1: e2464f7c6dff2556722f850ab8e8688a9a04af52 SHA-256: a43d5145ddf6b5c3f4dc76b12b667e2b4283ff3003eca8d44573b7f7ec34cf1f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented in the document body as a lure for 'Asus graphic drivers'. The PDF also contains a link farm heuristic, with multiple links to Shopify-hosted PDFs, one of which is 'city_of_heroes_mastermind_macros.pdf'. The primary malicious URL is likely the entry point for a further stage of attack.

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.ru/pify?keyword=asus+graphic+drivers
    • http://javufifer.chaminademslibrary.org/uploads/1/3/1/0/131071258/1979624.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/city_of_heroes_mastermind_macros.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/12290156500.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/tilomuligudab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/89492870505.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/55898123912.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/xidataxemod.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/retudovozika.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/vufirusujisexadodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/zogetupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/zosimigofolidiburu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/dutotafemamikaparalusam.pdf
    • https://cdn.shopify.com/s/files/1/0438/8323/3448/files/1500369504.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/ding_fries_are_done_lyrics.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/
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008093.bin
0cc019e36dfd17f3fa5fd6bbea781d9dbe416899866845db9f92ba89b1b648ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8093 5352 bytes
font_01_sfnt_off000092c4.bin
2de5da454bc688c22c75f3b04bcbd31c2abc5757f81349a96b7d3496a4282bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 9728 bytes

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