Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee607424bfffce6…

MALICIOUS

PDF

53.0 KB Created: 2020-07-24 11:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39641eb672cb3606711265f8a8eeef2f SHA-1: 1ac1f51f643930a7a48960e615c8b768966a3a7e SHA-256: 6ee607424bfffce6561b36af3318f85b1283cc04eaefebf3823325004f2f8a89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is likely used to redirect users to a malicious site. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, many of which are likely malicious or part of a spam campaign. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=vegetarian%20flavor%20bible%20pdf
    • http://files.daedreamnh.org/uploads/1/3/1/4/131454523/wigijaradu.pdf
    • http://files.hesaidshesaidproductions.com/uploads/1/3/1/4/131438639/d64ad1101c7776.pdf
    • http://files.friends4metromotors.com/uploads/1/3/0/7/130776483/ecaaeeebb.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://files.flyawaygymnastics.com.au/uploads/1/3/2/6/132683292/5607518.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/bavomuzufajijegajixogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/56834826435.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/wufijekasikovibabowibib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/zarofojukam.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8898/files/dakifurub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/biwipi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/rekuveludavenugirozoxiluj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/fosodikunesawogezulot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/bulop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/vorufijadenoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/lilane.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/71951467666.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009198.bin
dc10d24be7b69ddd2268bf79a01acf3f89e29e255f82f925d62cdfefe36ddbea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9198 4984 bytes
font_01_sfnt_off0000a29b.bin
4bb5bc2fe11bbdc6f376bb66e4fda4374c27dba7b2166bb2163bcc051b68cd5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA29B 10596 bytes

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