Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f4e7463f30b2bc…

MALICIOUS

PDF

43.6 KB Created: 2020-08-24 05:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33c8f3bf65db602a1b8a05f5d4a2f38 SHA-1: 16e35d3ef9c04db47d74ad61c90a620c89956c83 SHA-256: 30f4e7463f30b2bcf1214144a47e47f69e587c808c3d79ddc2182715cee2dde8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=flip+animation+library+in+android'. Additionally, it features a PDF link farm, with the first URL being 'https://cdn.shopify.com/s/files/1/0430/2965/9797/files/maroguroluxi.pdf'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the document's purpose is to trick users into visiting this link.

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=flip+animation+library+in+android
    • http://fubef.jillrumleyart.com/uploads/1/3/1/0/131070197/7984553.pdf
    • http://files.kungfuabq.com/uploads/1/3/1/3/131379590/subagezejexalog-vizin-vezuket.pdf
    • http://files.deckbuildersiowacity.com/uploads/1/3/0/8/130814195/143cceec.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/maroguroluxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/python_numpy_array_affine_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/624386793.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/pesetenepijixeperav.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/mail_merge_with_attachments_word_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/ranolisigapujegefex.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/9696949897.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_off00006d00.bin
78885dc6716350b7c658a03c94fd8db976ef1d46ce7c52a5e97677a390563f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 5124 bytes
font_01_sfnt_off00007e4f.bin
e46d4830d0fd6e98fa0b0917ec98551699bdd954cfbd33baf47dc0b2f387113f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4F 10332 bytes

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