Malicious PDF — malware analysis report

Static analysis result for SHA-256 203b4b1c596869fe…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 15:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c989135d22622f01b19520a3a23573 SHA-1: 6753a6272c1a7c0f5be934ba564540c7c24e5169 SHA-256: 203b4b1c596869fe738cb6f239d08bc7ac1dbfad10157f747412ed9a9e5ca7cc
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains the URL https://ttraff.com/wix?keyword=maths+shapes+information, which is a known malicious redirector. The presence of numerous embedded links, including the one to ttraff.com, suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=maths+shapes+information
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/android_whatsapp_notification_sound_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/60519696114.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/4166420223.pdf
    • https://static.usrfiles.com/ugd/09273f_083aecc4782d41bca46e8b6e3c2ff2ae.pdf
    • https://static.usrfiles.com/ugd/353d00_540c480b0c2a4254ab205b3fec1d3d28.pdf
    • https://cdn.shopify.com/s/files/1/0439/3448/2587/files/60461125789.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/votozozefowikakazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/36010978883.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/beginner_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5662/7866/files/kokepuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/whatsapp_video_2019_hd.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_off00006f29.bin
8d3bee6e60a237161b1aabe099e3acb0269a1f74c0bab4ed11ac5adf22e5b91c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F29 5112 bytes
font_01_sfnt_off00008070.bin
e41a14ad935a502ffb5e6da328b6e498fe5a710e385de8eb53266cc9c407f60d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 10316 bytes

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