Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ab2790fa4bbcc4…

MALICIOUS

PDF

38.1 KB Created: 2020-08-02 08:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a28c92b22d759c1e602d61a2f1739447 SHA-1: ed968ac9d56ff8a45bd8af7eda75b826c6bfe3eb SHA-256: a2ab2790fa4bbcc497f21ccb4031bbca7754d926f841332400fa73b16e4f3450
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=drake+and+josh+go+to+hollywood'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several other PDF links, suggesting a lure to external content.

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=drake+and+josh+go+to+hollywood
    • http://files.communitybuildplaygrounds.com/uploads/1/3/2/3/132303388/1b8de03b568.pdf
    • http://files.aplmf.org/uploads/1/3/1/4/131406275/zisatonefaki.pdf
    • http://files.jenningssheffield.com/uploads/1/3/1/4/131452836/a72b8a62f028.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/7979715545.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/vakag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/90781485411.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/64813061673.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/tasetasut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/28918333954.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7859/files/78890947459.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/wepuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/fallout_4_start_quest_command.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/60263560883.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045ee.bin
548e20033692fe6b3a86fab1b51a05221795c6b9d6a106d6e86194139a752b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45EE 5160 bytes
font_01_sfnt_off00005796.bin
4905a5c0c2d4e884f9f6fa262e4dac781c8443c1a61496878635affc6fc8a4b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5796 10652 bytes
font_02_sfnt_off00007be7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE7 4324 bytes

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