Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad0e3cebff6e160…

MALICIOUS

PDF

50.6 KB Created: 2020-08-03 17:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a597f0407a3aee9ff6248ff7b552724 SHA-1: adc78ab17f3ccae53f5a1c8c7a44e45735a9b6e0 SHA-256: fad0e3cebff6e16084915952f9423b5f5be6b19a59416150cae8d6fdceda8ce3
168 Risk Score

Malware Insights

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

The PDF document contains a lure suggesting a free download for a file converter, which is a common social engineering tactic to trick users into clicking malicious links. The embedded link 'https://ttraff.ru/pify?keyword=autocad+file+converter+pdf+free+download' is identified as a malicious redirector. The document also contains a mass of external PDF links, many hosted on shopify.com, likely for SEO manipulation to improve search engine ranking for malicious content. No scripts were extracted, but the presence of a malicious redirector and a clear social engineering lure indicates a high likelihood of malware delivery.

Heuristics 5

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=autocad+file+converter+pdf+free+download
    • http://files.mykharms.com/uploads/1/3/0/7/130739251/vowazexiwek-xazevawuvuseduf-fixufag-nalegotesu.pdf
    • http://files.cardionrcc.com/uploads/1/3/0/7/130740090/7388e.pdf
    • http://files.chimscan.net/uploads/1/3/1/3/131378776/xujamalupiluzex.pdf
    • http://files.rossmoynechihuahuas.com/uploads/1/3/1/4/131437246/jobaludi-xalukomita.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6101/files/60952543195.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/witonetowetefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/57238259297.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/braconidae_parasitoides.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/lunexixexof.pdf
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/39796838443.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/65949756899.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/dutugemipojumoxefinuvuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/zunajabileb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/silufudufesijizenojojida.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/82261963616.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/neretekidu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006660.bin
2635b47da028bd23442543003f59060e0516cb5fb0177a0b19fbd5c89a8d84c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 4996 bytes
font_01_sfnt_off00007774.bin
9c51e53a6675a7426c6a31f4f7fe5e287f6d8456f59a429d5b84f9e252b8ec31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7774 10104 bytes
font_02_sfnt_off00009a55.bin
f283a563ee48c68d0f210b91d059b93f2da97875a4894e08c15e1f8ed5b97a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A55 16076 bytes
font_03_sfnt_off0000aef9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF9 4324 bytes

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