Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0539f95f54604f1…

MALICIOUS

PDF

67.8 KB Created: 2020-08-20 03:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37702b727bcba5a7b1abce58a6098e23 SHA-1: 0fba78102fc6e665c3a38456584567e0cdb40c48 SHA-256: a0539f95f54604f115eaa7bf3795e0eec83eee50872891fa53c35f6ac5a2eb02
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that is likely part of a phishing or malware distribution campaign. The PDF also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm for SEO manipulation or to host malicious content. The ML classifier also 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.cc/pify?keyword=citroen+c4+2012+manual
    • http://fojidupij.benthompsoncreative.com/uploads/1/3/1/1/131164250/9294282.pdf
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdf
    • http://files.rja-designsbyslaglellc.com/uploads/1/3/1/6/131637257/7051403.pdf
    • http://tamenixu.sgamesandphones.com/uploads/1/3/1/8/131872048/lisol_gonetupi_fadiged_tataloxuvijetu.pdf
    • http://files.madlightingdesign.com/uploads/1/3/1/0/131069879/ximivezoda_tajemalipax_bipone.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/bootstrap_4_form_validation_without_submit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/fegaxufudiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/22696457074.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/baofeng_uv_5r_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/babysitters_black_book.pdf
    • https://cdn.shopify.com/s/files/1/0451/0508/6616/files/32112116025.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1199/files/ase_guidelines_regurgitation.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/mepafofapufodaxuwikexebov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0841/7192/files/destination_b2_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0452/2449/3213/files/9742942184.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/attendance_management_system_documentation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abfd.bin
0f93b850463742e48f8e4ab73d9a09346b56a98f0d7475bceb6f3cfe2db4a349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABFD 5088 bytes
font_01_sfnt_off0000bd37.bin
2eb3e9d5917dd7f46c13042cb84fcaa0089d0886597c23f353ee5e4ba050c30f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD37 15760 bytes
font_02_sfnt_off0000ed24.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 16060 bytes

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