Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18a975768d4461a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 23:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434e42a8aa5e31598e807892db64f9ee SHA-1: 0c7025bd42a67d3c67c969b9071bcb787dde19d6 SHA-256: c18a975768d4461aaee275833c75afd776cc0faadc9dae31c1ec1358c30f598a
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=yelp+fact+sheet+yelp', which is flagged as malicious. The presence of numerous external PDF links, as indicated by 'PDF_SEO_LINK_FARM', further supports the malicious intent of directing users to potentially harmful content.

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=yelp+fact+sheet+yelp
    • http://kanujit.no16cyclecaps.com/uploads/1/3/2/7/132712109/mobugoware_japeberedo_voxelutudiz.pdf
    • http://files.grayduckwatches.com/uploads/1/3/1/4/131438067/ruxafawomana.pdf
    • http://files.rexforddrive.com/uploads/1/3/0/8/130813732/d93f701ec22.pdf
    • http://files.lumacomi-observatory.com/uploads/1/3/0/7/130776268/gevozoras-kexif-difowuxagomuk-juraxekofu.pdf
    • http://files.wisdomrecoverycounseling.com/uploads/1/3/1/4/131407227/2101776.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/44292907310.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/xezexupawimusukidosox.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/bakudubafezifopuxusub.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/50264988801.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/gujuvuxupoguduwatulevarop.pdf
    • https://cdn.shopify.com/s/files/1/0432/3069/1491/files/anemia_defisiensi_besi_anak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5389/1232/files/lightroom_key_gen.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/kemanotakuvegukotuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/tepogenebeteworubajug.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_off00006c0b.bin
4ba45b31eba941f6727e00c9c98e508b6d2621b6b169861923e97ec9ce6e5917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 5072 bytes
font_01_sfnt_off00007d50.bin
6dc3fe7e123837e36a0ba7d480cc8573dda6b9bc9b94605925ef7e3653d1beb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D50 10116 bytes

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