Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8337bcf1a14c51b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-15 01:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c10839e01dd45930dcbe0d9825c82acc SHA-1: cab5ebcdfed3ecc7e9c60a3e447b693fb2be147c SHA-256: f8337bcf1a14c51b47fa3f3ae6b6030b6cc2ca59aa2d7bd2d8b0bf5e94153e82
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and keywords suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=lamborghini+song+dance+free
    • http://files.theprowlradio.com/uploads/1/3/1/8/131858287/mazageliku-futiboxu-penekizumalujo-laniji.pdf
    • http://files.socalfcboosters.org/uploads/1/3/0/7/130776489/9959126.pdf
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/36000065731.pdf
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/38036292009.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/wazusorutagatilelotudizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/2018.pdf
    • https://cdn.shopify.com/s/files/1/0441/2784/6552/files/gujezek.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/fotatomosobisizipesukef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/komofumusumupiwofina.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/marble_balst_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/heat_by_mike_lupica.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/12611407699.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/tarapimipatodo.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_off00005092.bin
36d05f261359fd2ef0bf14b4de7b8516b10bcd188a849b901894ee28c1c295cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5092 5484 bytes
font_01_sfnt_off0000630f.bin
2a72f0372f6939fee5cfe00ed245481a92f27238abbcf1d458413c231e9ac7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630F 14076 bytes

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