Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee328b5cad6f1bf2…

MALICIOUS

PDF

91.4 KB Created: 2020-08-10 02:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 607d7a6b91af76486ea3225d580816d5 SHA-1: 1ccdb171fbef32541fb3e52febd6e47a2edca73d SHA-256: ee328b5cad6f1bf2f69c3cb58fbb4d02d54bc933bcd3a53aa71fa7c436e24b5e
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 firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The 'SE_BROWSER_INSTALL_LURE' heuristic further suggests the document's intent is to trick the user into performing an action, such as clicking a link to install a fake extension or viewer, which is a common tactic for credential theft or malware installation.

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.ru/pify?keyword=cascading+style+sheet+in+html+pdf
    • http://gotupeka.sanikiluaqfreezer.com/uploads/1/3/1/6/131606407/3699573.pdf
    • http://files.jashancatering.com/uploads/1/3/0/7/130776735/lepisobanijukal-sevotol-dubuxekavab-watazipemozu.pdf
    • http://files.intermezzogallery.com/uploads/1/3/0/7/130776486/digebizetonodux-xirawafe.pdf
    • http://files.reechunter.com/uploads/1/3/2/7/132710634/6583576.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/remasazikixurinitesumigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/82353951872.pdf
    • https://cdn.shopify.com/s/files/1/0438/3342/6082/files/hunger_games_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/27821916620.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/zetetukekisopuvevepusix.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9256/files/34581941224.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/13937013976.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6607/files/rental_agreement_format_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/werezifijewifosikaruvazim.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/16038033710.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/51197601571.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/gazizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/serukulavasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/witikimevi.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_off000105f4.bin
762c3a34a94b1fd108343a503003308044af60ce2722ac339712333ce6e1bcd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105F4 5480 bytes
font_01_sfnt_off00011879.bin
ff1222312c7e663e6644f947128c4ef64503c507f8368cc77dbe5d219a1b6373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 16164 bytes
font_02_sfnt_off00014afc.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFC 16092 bytes

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