Malicious PDF — malware analysis report

Static analysis result for SHA-256 2529be79a5ec1be6…

MALICIOUS

PDF

46.4 KB Created: 2020-08-29 21:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e58899b84f59d6c69b8ef34d8cc8f66 SHA-1: 23e23966583aa8abd54f5707c21cebf00c5e8311 SHA-256: 2529be79a5ec1be669f8c13de74ccb69dd4d7346eaa444b9b74b12438c6f8409
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/wix?keyword=i+believe+movie+download+free, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text fragments related to movie downloads, reinforcing the lure. The presence of numerous other links to Shopify domains suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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/wix?keyword=i+believe+movie+download+free
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/proyecto_de_grado_umsa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/99573550762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d0dcc6942254291ad08b1dd63b43c85.pdf
    • https://static.usrfiles.com/ugd/b8c837_be65843724d34769871064a9dcede3b2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/32420876053.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/brahmacharya_ke_sadhan_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/homeostasis_notes_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/fexamomapoxutekojefabeker.pdf
    • https://cdn.shopify.com/s/files/1/0433/8784/6806/files/juborujudimajomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/wizard_of_oz_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/74032191344.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ce.bin
207c6d27bc9bab5ca9aa93eb8a805316c6737dead606b07cb4b3a355a4de6493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54CE 5104 bytes
font_01_sfnt_off0000661b.bin
a94fc0b04a3ff4da30cea24b3fb8f2fee2c1ab2008078f8bc2ee051ee710afb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 2240 bytes
font_02_sfnt_off00007033.bin
5b296c9f4bb5f698ddd099a5dafd418e8dbe50a3e98b4a20c0d2fab03f428023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 10252 bytes
font_03_sfnt_off0000939e.bin
8c5d4400cf5b12c8287f6780b0e30124a8c90ab5306ec94b5de0ae84e360a035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x939E 16908 bytes

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