Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ea45db53c34fb9…

MALICIOUS

PDF

45.2 KB Created: 2020-09-11 11:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbabfa31f7491265c450e88fe9c774d8 SHA-1: 0dda8ba1ba56c9b3c15015178677e7bc90daf4a6 SHA-256: 05ea45db53c34fb95441c92cc03757196b2dccafaaa6112fe76abf01a7ebea22
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to generate traffic. The presence of multiple embedded links to external PDFs, some of which are hosted on Shopify, suggests an attempt to obscure the malicious redirector and potentially engage in SEO manipulation for malicious purposes.

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.club/wix?keyword=beautiful+eyes+images+for+whatsapp+dp
    • http://files.glamourpupsjax.com/uploads/1/3/2/6/132695569/wululoxomibesaf.pdf
    • http://jerexod.robertomaldonado.com/uploads/1/3/1/3/131380213/7197083.pdf
    • http://files.thesurreysaddlery.com/uploads/1/3/2/6/132696233/mugukumok.pdf
    • http://files.mindfullbpc.com/uploads/1/3/2/8/132814219/pigogozamesaba.pdf
    • http://files.earthchildbooks.net/uploads/1/3/2/3/132302940/xepavodizidil-garowujenu-gubugoxudemakow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/wiwewupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/dresser_rand_compressor_performance_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/3576058285.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/58903053293.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9543/files/zesibogigasewo.pdf
    • https://cdn.shopify.com/s/files/1/0463/2533/4171/files/circulatory_system_quiz_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/podif.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/11141236312.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/ordering_fractions_worksheet_gcse.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d5f.bin
e2767ba039443ab418c8edd1eae4e1366dbb24454b569305b7a518b731fbe2e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5F 5700 bytes
font_01_sfnt_off000070aa.bin
16aec5a2c8dfb8481a3c1b032f45fb05beafa06c7b4db767f4d8809920faa2fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AA 3592 bytes
font_02_sfnt_off00007edb.bin
f11a727ee0f45419392b60ebfd9627cc900e61cd8887235b854a7dc86b9643e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDB 12728 bytes

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