Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba706250e6865c6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-15 17:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a17732e0a36315aff4518591a5141e7e SHA-1: d178eaf03f18709879b4d8d479fb26f89b098855 SHA-256: aba706250e6865c6a2ebbd431006270b5585c7198acb0faa7cb75b6411d8bb96
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, classifying it as a link farm. One of the primary links, 'https://ttraff.ru/wb?keyword=smart%20cities%20for%20sustainable%20development%20pdf', is identified as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to 'smart cities' to encourage clicks on these links. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wb?keyword=smart%20cities%20for%20sustainable%20development%20pdf
    • http://files.oreganconsulting.com/uploads/1/3/2/7/132740249/korevobesugike_vedet_sezadifiwul.pdf
    • http://files.josiesjoys.com/uploads/1/3/0/8/130874104/finulesozonotuw-xapapekej-rokamamapu.pdf
    • http://migunut.calgaryboxingclub.net/uploads/1/3/0/8/130874493/winibegusa_lenanu_supapuxapava_fubiwomofader.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/81847351079.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/31608884649.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/18022775618.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/tirodefolibewegomitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/19546787291.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/17038344298.pdf
    • https://cdn.shopify.com/s/files/1/0451/2101/1865/files/literary_devices_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0447/9670/6967/files/26542739223.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/mepunakigotivoru.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/9339194894.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_off00005cb3.bin
ecd23e5e5b8d27544589aee640d08b6debcd69f632750b379d8d1e56ff1a8a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 5604 bytes
font_01_sfnt_off00006f99.bin
00f2c562d3724fabe6d8307770199d9656c7c9c8c8114aba4df537a04b798a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 10200 bytes

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