Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab762fe8663e40a…

MALICIOUS

PDF

68.4 KB Created: 2020-08-08 22:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f23d4c8cb018a3ada75b2cbf4cf5ef1 SHA-1: b7c35e3db2dad5a3ede355243401ba48e9448a06 SHA-256: fab762fe8663e40a657ed02724615c9e02bcd9f858db71e50d4c28dd41ef8939
168 Risk Score

Malware Insights

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

The PDF contains a link disguised as an exam preparation document, which is a social engineering lure to trick users into clicking malicious URLs. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document prompts the user to install a browser extension or update, a common method for credential theft or malware installation. The link 'https://ttraff.ru/pify?keyword=examen+ceneval+prepa+pdf' is flagged as a malicious redirector, further supporting the malicious intent.

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=examen+ceneval+prepa+pdf
    • http://jufotof.cruzing4photos.com/uploads/1/3/1/4/131483281/650556a8f.pdf
    • http://files.ashleyparsonsyoga.com/uploads/1/3/2/7/132740415/newixebomufobezofawe.pdf
    • http://files.vivotrainingsystems.com/uploads/1/3/1/3/131383943/ruwuvi_lagozizog_jusibusojutape_fajereguga.pdf
    • http://files.oxnard-photography.com/uploads/1/3/1/4/131409037/furefilek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/dorapamofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/jivuriwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/cardiothoracic_surgery_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/4640349210.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/fadivadibibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/rakusifiralenixufil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/zebuzexarefeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/12586543374.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/31190362492.pdf
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/daxamewop.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/illinois_llc_annual_fees.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_off0000cd68.bin
838b8779be8b399588f95a34e5dadd7c413bcfb24a538487030881ed3c34f7ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD68 5208 bytes
font_01_sfnt_off0000df17.bin
9f8f7ac0b562d068fa0503a17bc96e67dbe1110ce81b3da25d3760fd03d027a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF17 10964 bytes