Malicious PDF — malware analysis report

Static analysis result for SHA-256 03333a7cd52c351c…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 09:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48f72e161df217b66c23d2d23481ae83 SHA-1: 76ae7ace6fc6b9b28e09177d8a4d90ffa31bc846 SHA-256: 03333a7cd52c351cf8611d47323a5aa60fc59edee7f97ff6a329d7a6eda08371
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=naare+takbeer+allahu+akbar+qawwali+song', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in directing users to malicious infrastructure.

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.ru/pify?keyword=naare+takbeer+allahu+akbar+qawwali+song
    • http://tenusoko.misspankhurstslearningspace.com/uploads/1/3/0/7/130776891/f1d2f4.pdf
    • http://files.astrologermaggie.com/uploads/1/3/1/3/131381078/vusen_sewogajax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/tutorial_adobe_premiere_pro_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2462/0447/files/40316363706.pdf
    • https://cdn.shopify.com/s/files/1/0452/7859/3185/files/fixupezexagedom.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/suxexovuvefil.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/mizox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/supermassive_black_hole_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/lufisutukojukudodilibapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/absolutely_almost.pdf
    • https://cdn.shopify.com/s/files/1/0439/1125/0075/files/jemalijidepiledal.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/bivutuxuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/31237146278.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_off00004b3c.bin
d480d79315d9bc24418b39b94e8e4a03faf54615d7c70de913b9e9294b4e4854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3C 5340 bytes
font_01_sfnt_off00005d71.bin
549bd3a2ba248eb815554e9a7bdc5cf267635a2bc12821a35a0baad420f1b832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 12740 bytes
font_02_sfnt_off0000855e.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855E 18776 bytes

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