Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce890ab7c5a3ea37…

MALICIOUS

PDF

42.6 KB Created: 2020-08-13 17:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680976944d7bc3786fa5df3e1da15753 SHA-1: a67f22ae7ad5059c2f2c1768df8ae509423aef92 SHA-256: ce890ab7c5a3ea370f20826ffd89ced230569f444306667cece05c2aeb2b1156
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. This indicates a likely attempt to direct users to malicious sites. The document body itself is largely unreadable binary data, but the presence of the malicious redirector URL is a strong indicator of malicious intent.

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=defining%20contemporary%20art%20pdf
    • http://files.sarahruthless.com/uploads/1/3/2/7/132740371/5910670.pdf
    • http://nenim.jeremydhoward.com/uploads/1/3/0/8/130814328/8142664.pdf
    • http://files.mcadoos.ca/uploads/1/3/1/4/131455463/80e2b45281.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/lonuwojutudaminib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3812/9823/files/mupoturu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/40480926408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/76356939711.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/zetagarigido.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/8782729034.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/nekonudotuvurabovuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/54273232277.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/social_problems_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/wakab.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/47934476546.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_off000064fd.bin
95a802e6452eb9d6df079be2e582614de0ee5c3131e215988bc4c91e97f95f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 5364 bytes
font_01_sfnt_off0000772d.bin
22a2c1ab11f3ba75d7b358783a67eabbbfde91b041298188f6c59023939c02b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772D 11332 bytes

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