Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc51df6a6c6b339…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 01:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad97c87a050bffe47e9e3e1ded454e3d SHA-1: bd5ae6c5f46fa3a3607f7426bd3c0665ab4607b6 SHA-256: 3bc51df6a6c6b339780f1bbacfe57c3645f087c01850b988027fb5681e22d9e2
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links, 'https://ttraff.com/pify?keyword=super+beaver+rashisa', is flagged as a malicious redirector. The document body is heavily obfuscated but contains references to the same URLs. The overall structure suggests an attempt to leverage SEO or redirect users to malicious content, rather than a direct exploit.

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/pify?keyword=super+beaver+rashisa
    • http://dupovo.spikemclarrity.com/uploads/1/3/0/7/130738948/muxujerimimenoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/zosotiwimodakojujofekor.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/appointed_person_lifting_operations.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/fogosijuzuvopamojaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/blemish_remover_photo_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/13221440013.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/karosenowavoteboroderedi.pdf
    • https://cdn.shopify.com/s/files/1/0463/0813/0981/files/41752220289.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/7854269269.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/cultura_de_estados_unidos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/wonizuze.pdf
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/free_standing_metal_carport_plans.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/9126354240.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/31625424119.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005550.bin
c1871b97706ae924838385260039610a7eacefd65b993ec05958891ab6999512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5550 3168 bytes
font_01_sfnt_off00006095.bin
fa28c6b477af563bd6a11a4f2928f318a5963603f62b4d9978ab8e52a30baf92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 5176 bytes
font_02_sfnt_off0000722b.bin
1d043905e8ea3b7646a0f40f020eee347cddfa4fb05158388b063051ecd71a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 15512 bytes

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