Malicious PDF — malware analysis report

Static analysis result for SHA-256 216f393f106129f2…

MALICIOUS

PDF

60.3 KB Created: 2020-09-19 06:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 430174640678c80f2e17cbb1bf076966 SHA-1: 2d79e6f8d3d99ba5d238025e0ded220aa54f016c SHA-256: 216f393f106129f2e1ae5b21d2d2218cd825e62a1f70fd2a88fa028173604d58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic indicating it's a malicious redirector link, pointing to a URL that includes a keyword suggesting an answer key. This URL is part of a link farm, with many other links hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's text prompts the user to install something, a common social engineering tactic.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.link/wix?keyword=ecological+pyramids+virtual+lab+answer+key
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/mysql_connection_string.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/class_11_biology_chapter_9_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/tidirekilemitige.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/33476332708.pdf
    • https://cdn.shopify.com/s/files/1/0454/5613/0200/files/biomagnetismo_dr_goiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8641/9870/files/vojanavidijiwofizare.pdf
    • https://cdn.shopify.com/s/files/1/0435/7573/8527/files/49560969261.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/cuales_fueron_las_5_plagas_de_egipto.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/3620/3415/files/53414347365.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/jibupupuxenasiji.pdf
    • https://24cbfadb-1610-4e87-98a5-419c00eabb09.filesusr.com/ugd/35ddae_72b71b860a5b4fc9b449d71ed56ed73e.pdf?index=true
    • https://d4002523-a92b-469b-9f84-e739401b90ad.filesusr.com/ugd/668a47_a0bfb1d6fd7041918a09e08c39b782d6.pdf?index=true
    • https://2bb3c357-3801-4d30-a0af-b6011697c811.filesusr.com/ugd/35e1ce_50ea98591fdd448095f647ec412b3fd8.pdf?index=true
    • 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_off000093ec.bin
15ddf1b2797c654710f6a471df23e13b42cf6e73ec706bab4a50c0ddb3d80814
pdf-font-stream PDF embedded font (sfnt) at offset 0x93EC 5808 bytes
font_01_sfnt_off0000a7bc.bin
86243368291b9dacacd579c88137c243cd4ae3d0b5774cfaaa8ef42c2d6a552a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BC 10288 bytes
font_02_sfnt_off0000cb3a.bin
2c9ae159d9fa86f1b720ab867039a809abc82cd28afdc2a7a0d04b7ca86b516c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3A 16912 bytes