Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d9422ff35f4231…

MALICIOUS

PDF

40.2 KB Created: 2020-08-01 09:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63b5fae1e316bda05c40defa8fc6ffa7 SHA-1: 1ac924acc804c63f42801e2432786ed0211d45d1 SHA-256: b8d9422ff35f4231cf32087c3c3b5ec93f47b6ecca09f1ffd5bca45f6031cf1e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the heuristic. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents. 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=da+form+7223+1+pdf
    • http://files.ginamagnoliaart.com/uploads/1/3/0/7/130774962/2d662c3b4f.pdf
    • http://files.lhasaapso.is/uploads/1/3/1/4/131482884/zikisunagew.pdf
    • http://files.electricrailwayclubsflorida.com/uploads/1/3/1/1/131164032/9960952.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/jebokapuzetikevisarupux.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/81279344550.pdf
    • https://cdn.shopify.com/s/files/1/0428/3619/7542/files/jemaxusupijugoribolavi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/sotafokevofux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/new_years_resolution_meme.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/gifejomugobodadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/19050870259.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/86717948027.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/sitoguleb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/6932377875.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/69613572653.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/bexojopejiguzob.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_off00005f02.bin
6b7bc731bb29d94c19db9b4ad3925f1d35aa9b4fbdcd3b497eec0e6dd0c55077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 5404 bytes
font_01_sfnt_off0000716b.bin
034530d76deab0fececdc3aa452f9fae4bc94f12eaab20901b7904dacff5924a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 10136 bytes

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