Malicious PDF — malware analysis report

Static analysis result for SHA-256 a459c3410bf62ce3…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 03:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e1bb9405640f66b998cc485883c23a9 SHA-1: 19cd2c2e09e29f9a1c350971d4f2adfc3eec1f92 SHA-256: a459c3410bf62ce3265a59d4329de2f486f371bab53eb39ba3f01761a87bbc85
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=el+leon+rojo+libro+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of numerous other PDF links, as flagged by the PDF_SEO_LINK_FARM heuristic, further supports a lure-based attack pattern. No scripts were extracted from this sample.

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/wix?keyword=el+leon+rojo+libro+pdf
    • https://static.usrfiles.com/ugd/b8c837_21b5a5a532714f12850f8b1957d32f77.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdc77f2aa0844d95be48d2cfbe874bbd.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_b43552ea7d5b4a2db84c49ea0413fdb4.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/bncc_2020_em.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/accounting_packages_notes.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/konkani_catholic_bible.pdf
    • https://static.usrfiles.com/ugd/76156b_5c6ef6d97015431f9ca1c6488d494829.pdf
    • https://static.usrfiles.com/ugd/136d07_304ad6b3b92b4476a562ababe5d614d0.pdf
    • https://static.usrfiles.com/ugd/db93e9_5bbe9e3f4e3d4effb1d3f191ddfd8b22.pdf
    • https://static.usrfiles.com/ugd/345929_551c0c86a4d842d1baa9f493ef1073cd.pdf
    • https://cdn.shopify.com/s/files/1/0434/5826/5238/files/discussion_lab_report_chemistry_titration.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/lemajesijujoxuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/velema.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5609/files/bimurixapusopibuzesugoz.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_off00004867.bin
ed1786223f190babe19d521a0add4e29a3c1d6a0700df4997c7fd9dc9c595f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4867 4820 bytes
font_01_sfnt_off000058d6.bin
af7e4c7b71e324c1ad09259276caf658c54515db9755165ba31b7d93e193d274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D6 10192 bytes

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