Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd080f1667e2dceb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 02:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a6df94faebe8d9dde548291b7a8e802 SHA-1: d423df72d1bbc610f2689239d16484d03a28a9ce SHA-256: cd080f1667e2dcebb130962da2a948316fd30a40d08a14648564cef4a1114e00
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that matches the redirector's pattern and appears to be a lure for academic documents. The PDF also contains a link farm heuristic, indicating a large number of external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.cc/pify?keyword=cbse+2019+class+12+date+sheet
    • http://tokur.heathersharkey.com/uploads/1/3/0/8/130874493/xoxokitife-wefagax-dezig.pdf
    • http://files.divinesoulenergy.com/uploads/1/3/0/9/130969819/d55ccdadbe3c.pdf
    • http://files.firpoint.net/uploads/1/3/1/1/131164474/barupi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/45240319660.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/benamorijutazoregatujelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/philips_avent_monitor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/adivasi_rodali_dj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/sevikojumawuvezuxiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3427/9062/files/45077045614.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0177/files/4361262043.pdf
    • https://cdn.shopify.com/s/files/1/0434/1356/9690/files/aac_file_format_header.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_off00005e5d.bin
8f9c085b6a5a8b2b56501921080eab7f96cb97326a09c26bab6bd3020de4c15f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5D 5460 bytes
font_01_sfnt_off000070d9.bin
c18fe0e1ced471712c04a0131cd8f79ea42796fdd06278181188c223ab5ec5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 10256 bytes

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