Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee04c51b51c51ab…

MALICIOUS

PDF

45.0 KB Created: 2020-08-10 02:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a694b7e68efa06db941afd3d1d2b4f SHA-1: 5e071468ac3e96ccf542971489e4f0f341feeff8 SHA-256: 4ee04c51b51c51ab01b8d85a379b9c29c2189186777b8f444ea6ceee40b813aa
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. The primary malicious link, https://ttraff.com/pify?keyword=business+intelligence+analytics+and+data+science+4th+edition+pdf, is identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains text related to a book title, suggesting a lure for users seeking to download content. The ML classifier strongly flagged this PDF as malicious.

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=business+intelligence+analytics+and+data+science+4th+edition+pdf
    • http://files.chestermolly.com/uploads/1/3/1/0/131070178/4758504.pdf
    • http://files.victoriaessiestudio.com/uploads/1/3/0/9/130969791/1d1dd408d50a.pdf
    • http://files.cranberryportage.net/uploads/1/3/1/4/131483108/mavijufinuraga.pdf
    • http://files.mesabimusicaltheatre.com/uploads/1/3/0/8/130813317/nidabunifaj.pdf
    • http://files.cranberryportage.ne
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/1455725537.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/27772822012.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/89790038357.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/kovazuneligise.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7207/files/42103063285.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/sanitary_engineering_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/beginner_english_vocabulary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/mowukezenipatovifiporopog.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/comment_fusionner_des_avec_adobe_acrobat_reader.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/kuxewitebawaputulikevabab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/38501881101.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/68104550676.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/lojimuvuxokobe.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_off000070d7.bin
38d243c8e591688bc449258b94b4df526d53e85463c7679c1475df27cd5cdac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D7 5560 bytes
font_01_sfnt_off000083e0.bin
0c1d6ad33d142f7b3205a8e8592862b9e6a8de4c1287f07bdc6a53272feea047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E0 10040 bytes

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