Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74151da08063f15…

MALICIOUS

PDF

36.4 KB Created: 2020-08-01 23:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be6aad9533c6ef44ba30d49f5212b7ab SHA-1: 86acb53b045f2bfc71d635a24bedff6516a6a03f SHA-256: b74151da08063f15bff5e6b5aac51e31055c7f90c1344fa9820f2c62feed89da
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary link directing to a known malicious redirector at 'https://ttraff.com/pify?keyword=shrink+a+pdf+file'. This suggests the document is designed to lure users to malicious infrastructure under the guise of a utility. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=shrink+a+pdf+file
    • http://files.cypressparkflairs.com/uploads/1/3/0/9/130969775/mixopo.pdf
    • http://files.sugarmeclean.com/uploads/1/3/1/0/131070845/9495375.pdf
    • http://files.busedu.org/uploads/1/3/2/7/132711999/076e548b74.pdf
    • http://files.my-elliott.com/uploads/1/3/0/8/130873840/rosunufi-zuxajiwoxipuxeg-vogusum-rewevifafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/96325969280.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/7458630643.pdf
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/zatan.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/xutojem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/luwamapajasilatised.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/wupop.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/73810906420.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/xirevopuwoguranimutukoje.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/mutuj.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_off00005073.bin
61dd93d459c3fbf096a9ef8468958270bff6d054794366748c54076e13349033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5073 5120 bytes
font_01_sfnt_off000061d9.bin
55ce44f6d3336191bc8ef1b97634e46d81c044546a00d960dbf2868e5b17bb6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 10360 bytes

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