Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9a1d29e6e57c9b…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 05:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 518c4a6629cc011a526e8dff05e6e1bd SHA-1: 39e702ec860853a09b788075ccb01a4a655f5691 SHA-256: dc9a1d29e6e57c9b873466a7856ef1ed070b08e5d99a004d0ae407f631f40bca
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a critical heuristic firing indicating a link to known malicious redirector infrastructure. Additionally, another critical heuristic detected a large number of external PDF links, suggesting a link farm designed to lure users to potentially harmful sites. The primary malicious URL identified is https://ttraff.com/wix?keyword=conteo+de+reticulocitos+pdf.

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.com/wix?keyword=conteo+de+reticulocitos+pdf
    • https://static.usrfiles.com/ugd/b8c837_64705baa84e54f04aaef17b344e24764.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc467c1939b6440eab8b3330eb0c66cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce2eb99890cb4ec88b7d458bb6da8de4.pdf
    • https://static.usrfiles.com/ugd/b8c837_43f26e154eae4b17892fc0bc318985f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8555c1c37a24b359f0d14872b9a1c43.pdf
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/brunnstrom_s_clinical_kinesiology_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/38185626064.pdf
    • https://cdn.shopify.com/s/files/1/0467/7877/7753/files/fullness_chords_in_d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/bachon_ki_kahaniyan_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/ragiwojiwavokik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/galvin_green_golf_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/kitewaradadaragipana.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_off000075a0.bin
45879b5d47cffd956b1beb00a4362721fbf1ab69d2e10a250e447699f414e9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A0 4844 bytes
font_01_sfnt_off00008624.bin
ac5224ede2e9561da69055cd00ce520a5509c1ada2ff4e7a848221dcfd7f245b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 14752 bytes

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