Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5d65de4ea33448…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 00:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2bebdcfdada5382c1a4c1b7e3e5ea86 SHA-1: d9602939b7b980e9423d7b0a7d510e4b07f51496 SHA-256: 2e5d65de4ea334488f56c03e88f53375837463d225a10309ae0268f0c085f840
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=gastroparesis+diabetes+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting the user to malicious infrastructure via the ttraff.com URL.

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=gastroparesis+diabetes+pdf
    • http://tobetaku.tigermarchingband.com/uploads/1/3/0/8/130874330/7510232.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/sap_bpc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/2229/9815/files/castlevania_the_adventure_rebirth.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/jokuti.pdf
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/calicivirus_felino_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/36064070306.pdf
    • https://cdn.shopify.com/s/files/1/0458/6428/8409/files/fountas_and_pinnell_guided_reading_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/81702826883.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/pitezinunulejukavew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/zafijewopisikumox.pdf
    • https://cdn.shopify.com/s/files/1/0434/3362/3708/files/bufemexuxolazodudomiteton.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/zodolaxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/76201414615.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_off000063ff.bin
2caefa68969f658e717fa746f89fd4bd6b94485ffd09b32ba1517469d0766f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 5172 bytes
font_01_sfnt_off000075a4.bin
ef762f38ffcfb5087e30c287d3ce9651e80f46dd3bb4dd8fb71d94dfd0b62a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A4 10464 bytes

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