Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccce02b6cd97bd60…

MALICIOUS

PDF

36.0 KB Created: 2020-08-08 12:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9ec81923aa607d8212e825b9645275c SHA-1: dc3d8ed7fae76041518e96f266729a2c110f0c72 SHA-256: ccce02b6cd97bd602b638ca334ca051322d77f16716a27d9ea161347eeb42b5e
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 seemingly benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL. This suggests a lure to a malicious site, likely for phishing or malware distribution.

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/wb?keyword=complex%20noun%20phrases%20containing%20gerunds%20exercises%20pdf
    • http://liwizi.aphpersonaltraining.co.uk/uploads/1/3/1/8/131871699/5827534.pdf
    • http://files.garrettru.com/uploads/1/3/1/3/131379132/465d44f.pdf
    • http://files.myenchantedlocket.com/uploads/1/3/1/4/131437736/wifufitumemot.pdf
    • http://files.darajakenya.com/uploads/1/3/0/7/130738928/sulevasogit.pdf
    • https://cdn.shopify.com/s/files/1/0440/9180/1752/files/rti_application_form_pdf_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/lurifagimixozabedeteb.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/assembly_language_for_x86_processors_kip_r._irvine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0447/6734/6839/files/john_deere_gt275_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/advanced_computer_architecture_book_pdf_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7352/files/jowar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/la_santa_biblia.pdf
    • https://cdn.shopify.com/s/files/1/0438/0449/1937/files/wotiwekotigumozajefavibo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1160/files/hdfc_securities_research_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/wii_u_title_keys_for_usb_helper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36281161478.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/sistema_de_medidas_angulares_sexagesimal_centesimal_y_radial.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/8976324337.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/stihl_fs45_prices.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_off00004dd5.bin
d9776f04cbfdf8b80d15c2e7aea4f9e004a97ae90d16e84b3d2d6cf0ada8a811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD5 5540 bytes
font_01_sfnt_off00006081.bin
1ee9dc131379328344c2bd9424503f74cc2f19baac59681b66774afae68f4c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 9940 bytes

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