Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac906bee3be7daf…

MALICIOUS

PDF

39.3 KB Created: 2020-08-21 13:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b22355f67b47e4e72fdab60ba05f20 SHA-1: 29951b332b918104423ec5dfa2443a628745e6fa SHA-256: 8ac906bee3be7dafa4d968b8ec2f8a9ef41e47e13b515cd8511d9c08a0d87fab
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=education.+com+spanish+worksheets', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure users through search engine optimization or direct redirection.

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=education.+com+spanish+worksheets
    • http://files.thomasgkelleylaw.com/uploads/1/3/2/6/132683140/dowun_relidedo_bagezatifo.pdf
    • http://volufiz.23sneakerlounge.org/uploads/1/3/1/1/131163960/1881388.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/luxamovesomuvusefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/jejoselipebatowoxufum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/reliability_and_validity_in_research_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/56826999380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0825/3344/files/28900766206.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/12080822542.pdf
    • https://cdn.shopify.com/s/files/1/0461/6306/7032/files/58119885222.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/koxuga.pdf
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/systme_digestif_anatomie.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/vopodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/92362567899.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_off00005a1c.bin
c8c972b269e174b90139f05989947eb6b7fab08fe1ecd2189d139b86ade87440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 5424 bytes
font_01_sfnt_off00006c7c.bin
403fa40c0912f778c4f7e2a4d10dc046f590457010df0c987902ff89adcaefd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7C 10632 bytes

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