Malicious PDF — malware analysis report

Static analysis result for SHA-256 0004fc20211a3cde…

MALICIOUS

PDF

71.3 KB Created: 2020-08-25 05:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb763c9fac9795e13f4df9524c87f3f4 SHA-1: d08fa4b518dd3ca13c16978264e7b46ee72a41b9 SHA-256: 0004fc20211a3cde48de7b460f27b223388486e1cb38bfada675846e961a8d02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a link farm, with at least one pointing to a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=arjun+r+meda+2019+new+song, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains junk data, but the presence of the link farm and the malicious redirector strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=arjun+r+meda+2019+new+song
    • http://files.amazingoliveoil.com/uploads/1/3/2/6/132681342/36b9b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.indictrans.org
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/4545222794.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/http_filesify._com_wr6jfm.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/momazujodube.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/72064232666.pdf
    • https://cdn.shopify.com/s/files/1/0439/7511/4910/files/xopoviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/xalive.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/ketone_allgemeine_strukturformel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/sitativogogazuwusofinu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/mac_address_on_macbook.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006377.bin
550341dfe4527a468d602e95505f2660710b913dc5ba9c7f29e1fa8c6edf63d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6377 5752 bytes
font_01_sfnt_off00007702.bin
0fcc79a35faa30102ecaf585cf499f7ce8d0cb4cca299bb25a18576cde7fb8e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 8264 bytes
font_02_sfnt_off000091c6.bin
da411963b41832a564f7abe1658659ddf10d92171fa9916213fd8893ad226bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C6 11256 bytes
font_03_sfnt_off0000b153.bin
ab45b86bfc3b33711b6e6890995eb862dbe74edd928a9b23af085817a6f75f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB153 16072 bytes
font_04_sfnt_off0000e2fd.bin
b6da1d20add208b87600cea40cfa30b0faed2e6bf4566f7707a8427be7bf1b3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 16540 bytes
font_05_sfnt_off0000f9bb.bin
5d1baa09d05ac6742df2d9587432dd924078a8b978e865253e5379e970bc3abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 5448 bytes

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