Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e36a7122b7e833e…

MALICIOUS

PDF

47.1 KB Created: 2020-10-07 08:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b5120d352720507c22e02b2174466a4b SHA-1: 068ce1c3834902cf4a5a09210fc5ff60ad9e35cc SHA-256: 9e36a7122b7e833e63c9a92ee7aa5ef0ad6bc38b47e9b05928a8268339ff6aaf
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 benign Shopify domains, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or redirection attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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://gettraff.ru/strik?keyword=mercruiser+350+mag+mpi+service+manual+pdf In PDF document text
    • https://site-1037829.mozfiles.com/files/1037829/97430300760.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/pisavu.pdfIn PDF document text
    • https://site-1039386.mozfiles.com/files/1039386/sajenawarapik.pdfIn PDF document text
    • http://popiw.hallvardlillehammer.com/uploads/1/3/1/4/131407089/d9eb1967744670.pdfIn PDF document text
    • http://files.wastatefed.com/uploads/1/3/0/7/130739250/9129146.pdfIn PDF document text
    • http://lopelex.vinesband.info/uploads/1/3/0/7/130776433/1e5bdd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0049/4241/files/how_to_open_console_overwatch_cs_go.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9803/4342/files/wukupoxorubopaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9267/5227/files/el_cuarto_misterioso_episodio_3_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1818/6663/files/david_graeber_direct_action.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/85630031581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2368316c-fa06-45f7-9c2f-7c6a331c00ed/8301037219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4742f92-8aee-4ab9-aa0d-39efd8cfd97b/kokowasusogusazedopefakuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8932028-ec62-4747-ab2e-f8c2fc3d96c4/tojobusef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e0b61d-9b03-41a3-88df-d7dacdc1d27f/pokizag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba3a259-e235-495f-9d17-486850fd118e/40127890245.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 5972 bytes
SHA-256: 20824583ea58bd8b2cbeb18438de6971ff6e92686fae8f180685436695d42ed5
font_01_sfnt_off00007d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 15556 bytes
SHA-256: 7ca8ecf1293fee4c2b6fa51036cbb11a7c9fbb897d71d6da6f07392ff0c9b825

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