Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6206ee39ed48aec…

MALICIOUS

PDF

47.4 KB Created: 2020-07-14 12:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf8053e4e549a9acea9f0789357d252 SHA-1: 318d59677d2da41f358dedcd23e7ea00909aad88 SHA-256: f6206ee39ed48aecbafd96f1305a352e0795f93d72439e825f9d50b1824f1c18
128 Risk Score

Malware Insights

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

The PDF file contains multiple links to external websites, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Cbse topper answer sheet pdf'. The presence of a 'download button' heuristic further supports a social engineering attack. The primary attack pattern involves tricking the user into clicking a link that leads to malicious infrastructure.

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.
  • 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/wb?keyword=cbse%20topper%20answer%20sheet%20pdf
    • http://files.saltysouthernroute.com/uploads/1/3/0/7/130774973/6271341.pdf
    • http://files.foresitemapping.com/uploads/1/3/1/4/131406606/f44cad48b44.pdf
    • http://files.flyfishthehighcountry.com/uploads/1/3/1/3/131398367/jigureroso.pdf
    • http://files.batholdtimedancers.co.uk/uploads/1/3/2/6/132695455/firinegif_dowejep_nirexipezajuno_kuroburono.pdf
    • http://files.jmsupplyga.com/uploads/1/3/2/8/132814990/5962788.pdf
    • http://files.burlingtontheatre.com/uploads/1/3/1/6/131637081/vulowowojajafeli.pdf
    • http://files.illuminatethejourney.com/uploads/1/3/0/8/130813931/tukopuzun_zukolujodemezi_jazobe_xegixavasep.pdf
    • http://files.jjenterpriseslcd.com/uploads/1/3/1/8/131871467/fuwikunu_sufekevena_nuzofun_vabekedidadow.pdf
    • http://files.illuminatethejourney.com/uploads/1/3/0/8/130813931/tukopuzun_zukolujodemezi_jazobe_xegixava
    • https://wuxorutaj.files.wordpress.com/2020/07/97153264960.pdf
    • https://mawumobu.files.wordpress.com/2020/07/nuzor.pdf
    • https://kiwuwuwaguso.files.wordpress.com/2020/07/revunapuxuvevenisazavizov.pdf
    • https://jikuzugaro.files.wordpress.com/2020/06/varefureje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24803542318.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/40763326685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/kipesupeminoxakafomubaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8422/6453/files/wisuvupuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/zinor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/8602926679.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_off00007c15.bin
b1d680dcc9ccdba0f63b1636add4a219a649235c2b034578b24c9d94cab6e8df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C15 5092 bytes
font_01_sfnt_off00008d5c.bin
0d6a290fa5fe7fb1c58b0fe50afa1dbf420f0b8dcaff04ee18e3fbee688fb4f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5C 10272 bytes

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