Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e67f3b1658c70f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 15:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89c566f316df170405cd8833a03b6489 SHA-1: 1a0bc77964f5eff1df23dd3d88b0e04bb1acf129 SHA-256: c1e67f3b1658c70f60e8d38e3b8660b6bb18953746b588bde46adbcad1eb9578
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 'https://ttraff.ru/pify?keyword=cheat+sheet+tft+blitz'. The document body, though heavily obfuscated, also contains this URL and numerous other embedded links, many of which point to domains that appear to be part of a link farm. The primary intent appears to be directing the user to malicious infrastructure under the guise of providing a 'cheat sheet'. No scripts were extracted from this sample.

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=cheat+sheet+tft+blitz
    • http://files.armelleaurelien2019.com/uploads/1/3/1/6/131606256/75252cd5de.pdf
    • http://files.peculiaritypress.com/uploads/1/3/0/7/130740044/e21756.pdf
    • http://files.ceciliabramhall.com/uploads/1/3/0/7/130775970/69e296ed4e06b1b.pdf
    • http://files.decksbydecamp.com/uploads/1/3/1/6/131636834/5737174.pdf
    • http://repap.monamourhair.com/uploads/1/3/2/6/132683328/gufovalezeravu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/18584028634.pdf
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/changing_manual_transmission_fluid.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/periodic_table_ncert_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/kanulobesugutefexav.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/lidujofodabogonibikodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/kosiwaderukeku.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3574/files/mp3lio_music_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/xiripisumib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/sigebupisef.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/78535094793.pdf
    • https://cdn.shopify.com/s/files/1/0428/5785/7187/files/atlas_map_of_world_free_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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006139.bin
82160df3cda8797133c16027a7385c832f4cc650c6537a1562425ce174c7254b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 4856 bytes
font_01_sfnt_off000071bb.bin
3e48f0a27da83809e9c70f8351966590fe3da1d9d05a5a47aed75f217033d831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BB 14600 bytes

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