Malicious PDF — malware analysis report

Static analysis result for SHA-256 741fe1ad35a56e85…

MALICIOUS

PDF

94.3 KB Created: 2020-08-18 22:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ab457f5de2f5af66bbfbc0abcf4d83 SHA-1: 8074a4088a791bb149f99f12214a0951ca492cd4 SHA-256: 741fe1ad35a56e85e87403b44fca5f5afd8e3aee434a59f0712ea58e1ed52e93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host or distribute further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise its malicious nature. The presence of numerous links to Shopify-hosted PDFs, likely part of a link farm, further indicates a malicious intent to manipulate search engine results or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=android+studio+3+kotlin+tutorial
    • http://files.sholansun.com/uploads/1/3/2/7/132740997/f3ec827.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/bopunakaratonesawugifemos.pdf
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/lilebinelojabogonase.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/kifasudijoganojulame.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/89384619755.pdf
    • https://cdn.shopify.com/s/files/1/0434/9604/6752/files/vorawusaluwimowoluviwujof.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/65491954941.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/zesebokunekiremezike.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/jukoxikipikewara.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/ripamapumivunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/91181531333.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/de_finibus_bonorum_et_malorum_english.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112d3.bin
cb6b98a7cc88822330129120c563d2e570fd3b651671cd6cac0b5114b8a3abe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D3 5036 bytes
font_01_sfnt_off000123fd.bin
d70d2a3923905123b3776640ec578d24b5c6a2ae4a2684ae6421e5fc55ae6d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123FD 15892 bytes
font_02_sfnt_off00015619.bin
1315ac7181716559bd6a329722203f1dce8f7b5d625759d8b2ae0fe1f26b3b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15619 16296 bytes

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