Malicious PDF — malware analysis report

Static analysis result for SHA-256 8884d273447523c0…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 07:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa6e0c85ddf77c6752e167a2d8c3a810 SHA-1: 776eed52f33726213bacc6ade4a5c78027274dfa SHA-256: 8884d273447523c08ec14da43aaf033263bc346f90bcada41a8f79987ca30576
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 a link farm hosted on cdn.shopify.com, ultimately redirecting to a malicious domain (ttraff.ru). This indicates a phishing or malicious redirection attempt. 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/pify?keyword=l%25E1%25BB%2597i+file+pdf+kh%25C3%25B4ng+ch%25E1%25BB%2589nh+s%25E1%25BB%25ADa+%25C4%2591%25C6%25B0%25E1%25BB%25A3c
    • http://files.cafamilyforest.org/uploads/1/3/1/8/131871501/1292629.pdf
    • http://files.polarbearfastpitch.com/uploads/1/3/1/6/131606069/segimunidujix_sedupo.pdf
    • http://kuvuke.highschoolspanish.org/uploads/1/3/0/8/130813528/refodabuxid-suvokifemilur.pdf
    • http://sevumexul.nancylbruce.com/uploads/1/3/1/1/131164250/ec1184404a07.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/beating_the_street_peter_lynch.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/dinazabewagabanejaru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/robafuvebatatawadodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/geludowaguxijile.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/breakthroughs_in_science_isaac_asimov.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/sopaxisisesarifig.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/46711585860.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/multiplication_and_division_of_binary_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/bonokivadobufurex.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/6492566274.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/89110184558.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/
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/breakthroughs_i

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d78.bin
67a57f19c521acae96e41260d9ded17ea9a9da7ddeaba44abab936ba2a159623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D78 6448 bytes
font_01_sfnt_off00008243.bin
df38a3647f140779d78c70fce7ad964054685834ef7d134098b5755ca3beb6a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8243 21644 bytes

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