Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cd19317e4a85f2…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 01:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 056c8e35663521404226fb64da5cdbd6 SHA-1: 65a5274ca92536f80b1c5fe6af00cc533954b517 SHA-256: 99cd19317e4a85f22b4c611f5580fe9c07264667f58d0cc8ab518aa122400b4b
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'Inferno mrs green apple piano sheet' and the malicious URL, suggesting a lure to trick the user into clicking the link. The PDF also contains a large number of external links, many pointing to Shopify domains, which is flagged by the PDF_SEO_LINK_FARM heuristic.

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.cc/pify?keyword=inferno+mrs+green+apple+piano+sheet
    • http://files.suisekiphilippines.com/uploads/1/3/2/6/132681207/josuzosetu.pdf
    • http://files.goingalloutfitness.co.uk/uploads/1/3/1/8/131872298/3889812.pdf
    • http://molurot.eroticabotanica.com/uploads/1/3/2/6/132696398/806599cccfe2b91.pdf
    • http://lovul.lotusranch-homes.com/uploads/1/3/1/4/131454215/savupuvesun-jorunazan-muwamanija.pdf
    • http://files.denmarkffa.com/uploads/1/3/1/4/131437689/c1741.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/teruwubojodasuvomagusoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/21524798172.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/koratasinawekisazadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1984/6311/files/28499599795.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/47481578514.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/87038657235.pdf
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/pasila.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/ditudanukidoma.pdf
    • https://cdn.shopify.com/s/files/1/0440/7869/4565/files/itunes_12._9._4.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4886/files/79680071159.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_off0000528e.bin
021156d21d78c52020093bae9ab549cf18ca670adfb931f8d972515c83d7baa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528E 5252 bytes
font_01_sfnt_off00006443.bin
05eabdee091eb8acb9509ecfc0414adc4b954c9600b92d56839907fe92252631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 14204 bytes

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