Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9b0d7f190fb15a…

MALICIOUS

PDF

48.5 KB Created: 2020-07-12 12:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 242c1978a92f35c8ac6d07325118c915 SHA-1: 0f72b9862d0622f56dc734e3f0da9f33864c37b4 SHA-256: aa9b0d7f190fb15a024374a2a716874bc084a0623f47b8d86f4a301e013c6484
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body also contains a call-to-action phrase and the primary malicious URL, suggesting a lure to download potentially harmful content. The presence of a link farm further indicates a malicious intent to distribute links.

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.com/wb?keyword=download%20pdf%20xchange%20viewer%20free
    • http://files.zidekmma.com/uploads/1/3/1/4/131453018/waxebudubusojij.pdf
    • http://files.coldironarts.com/uploads/1/3/1/6/131636651/xinotavesutala-fobaviw-xubugatukuj-pivipisuwegozuz.pdf
    • http://files.kapalalau.com/uploads/1/3/1/6/131636676/wowuta_monotus.pdf
    • https://rujosodudox.files.wordpress.com/2020/06/gafipaka.pdf
    • https://nelujepi.files.wordpress.com/2020/06/30962456595.pdf
    • https://jewifafubod.files.wordpress.com/2020/06/jitosigijudufex.pdf
    • https://panupobeguki443392900.files.wordpress.com/2020/06/50323004267.pdf
    • https://nuvakujumul.files.wordpress.com/2020/07/wanoroperomalefaruvasigok.pdf
    • https://woxonoxemu.files.wordpress.com/2020/06/34123565226.pdf
    • https://jopawetudame.files.wordpress.com/2020/07/numiduzasewaxefovefal.pdf
    • https://razowavof.files.wordpress.com/2020/07/lixisakuke.pdf
    • https://purupale.files.wordpress.com/2020/06/nudorezunejodixibuzusifin.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/84765630294.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/pibunifipowojepezufotag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/nukujawafef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/47679150184.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/bajavinodanajuxozifulujag.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_off00007f6b.bin
88e742f6e3a69f7e8b73090d32a0d53e7ca95ac7a7ae3f659879e6b6cf5eed8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 5164 bytes
font_01_sfnt_off0000910c.bin
f31edb6c409dac9d403fe36c891fbcb3936928c4c59fede7777821f9b8a12a70
pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 10472 bytes