Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db6d749abe3b064…

MALICIOUS

PDF

37.2 KB Created: 2020-07-27 20:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92cba41b82601f30c9fefd1115f08c2 SHA-1: 154cace834ef8383a522b90466abec08da998a10 SHA-256: 1db6d749abe3b0645aa87b96d7a5924af9ac7e5233a9339267a46fb5cce99ffa
150 Risk Score

Malware Insights

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

The PDF contains a link disguised as a Google Play Store download, which redirects to a malicious URL. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier also 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.cc/pify?keyword=google+play+games+apk++3.+0.+11
    • http://files.hallacroix.com/uploads/1/3/2/6/132681647/sakidarunolori.pdf
    • http://files.weberworks.us/uploads/1/3/1/3/131383943/4040280.pdf
    • http://files.ogsenergy.us/uploads/1/3/0/7/130739922/1330809.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/83128608208.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/65222570340.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/mopajijakojexinuroz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/jexenagebofokovupu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2441/6931/files/33662711852.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/62527242282.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/jevizamopafara.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/weverofod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/80012487829.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_off0000555a.bin
30ef3195c0bec54ef935fa0f8d35deb4e119508016de345bc14b509d503adf27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x555A 5184 bytes
font_01_sfnt_off00006719.bin
ff31a6717ac571e30c24af106b20b22f953483e81c6caf91be6105a11999f60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 9588 bytes

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