Malicious PDF — malware analysis report

Static analysis result for SHA-256 da16b40cdaeeaf3c…

MALICIOUS

PDF

52.0 KB Created: 2020-07-30 08:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 753770f7670e8ee1f31a5ab2f88bf26e SHA-1: 601a230f55c221b49a8a7bd731ebeda7d77fe512 SHA-256: da16b40cdaeeaf3ce68531fb0c22426c471b9b450aab769bc7940226d113f8cc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'ebook download pdf', suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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=the+art+of+war+ebook+download+pdf
    • http://files.developmentmedia.net/uploads/1/3/0/7/130775245/191367.pdf
    • http://files.wanyunshao.com/uploads/1/3/1/4/131453588/9e5a72fb01.pdf
    • http://files.skidmorecounseling.com/uploads/1/3/2/6/132682124/mamobedelidetinimoz.pdf
    • http://files.portanglers.com/uploads/1/3/0/7/130739340/rosoludil.pdf
    • http://files.highschoolsportsleader.com/uploads/1/3/2/6/132695663/nedaxamamolubon-wuseguporuxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/nizisewumisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/54435291489.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/nipudavitinejokexu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/78353838068.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/62874204798.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/weladegaperuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/botefig.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/tatuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/wagujema.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/zarifefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/vujup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/wufizekefeninube.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/1/0429/5809/4495

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d26.bin
ab00a5fe0fc99d69a48bf613aa0ba98b578625e3f88ee2be869b640685c8aabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D26 4936 bytes
font_01_sfnt_off00009df7.bin
1ba2685442af1c69ab383d7b919ac615c9ef1d7b40664b298f321d41769841ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF7 10656 bytes

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