Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f4ec4d0d37b618…

MALICIOUS

PDF

46.2 KB Created: 2020-08-05 06:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c338ad77e8c22baa5eb5c6ce4b9c34d3 SHA-1: 14c27bc0722fd74e02d1681f9ee16d635f0b9ba4 SHA-256: 94f4ec4d0d37b618afcf0e134e3de82bc07deade8406e732c9bc43e1f6e6dfc2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=definition+of+guidance+and+counselling+by+different+authors+pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains remnants of the URL and appears to be a lure for a PDF document.

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/pify?keyword=definition+of+guidance+and+counselling+by+different+authors+pdf
    • http://files.carolitaro.com/uploads/1/3/2/7/132740414/rugagomunasusa_rulizezidusifok_fipib.pdf
    • http://files.casa-collective.com/uploads/1/3/0/7/130775795/teniparogebum_dalos.pdf
    • http://xamuso.melbournecitydyeworks.com.au/uploads/1/3/1/8/131856919/rifimatesenok-jegobuwubavasil-xoramegemulave.pdf
    • http://files.car
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/wizodozi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/goguwape.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/42975021354.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/43699371258.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/poliwuzavigezurojesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/56447737668.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/30866257148.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/verzion_wireless_rebate.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/pimemofumokezevoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/lefutidubiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/gafibumeluxadobiwebogu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/jordan_belfort_book_way_of_the_wolf.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_off00007592.bin
d465660a99dd78fba8376d4c2b9258fd8afc5a72f71110649e293ea2d1eeb684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 5660 bytes
font_01_sfnt_off000088d6.bin
d0b433125ba536e8bae455d7251f4e30e2d3040413fac1296a3c54d2e94d6975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 10076 bytes

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