Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fea43c064b8777…

MALICIOUS

PDF

47.4 KB Created: 2020-07-15 12:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 466c084ebcc99a0562222eabe1550297 SHA-1: aebe328ee9bbe8e7e32987282bb011c68ca794d4 SHA-256: 48fea43c064b8777abf0ac0b8d05dd0bfc16c4c373b64deca3fce18d2ccb6bb8
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a mass of external PDF links, suggesting a link farm designed to lure users to potentially harmful content. The embedded URLs are the primary indicators of compromise, likely serving as the initial vector for further malicious activity.

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/wb?keyword=mark%20twain%20the%20celebrated%20jumping%20frog%20of%20calaveras%20county%20pdf
    • http://files.savcufflinks.com/uploads/1/3/1/8/131871891/puziledekowuve.pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/1/4/131438766/4121815.pdf
    • http://files.entrepreneurialnegotiation.com/uploads/1/3/1/3/131379709/2580595.pdf
    • http://files.christopherlewis.net/uploads/1/3/1/3/131398291/5301a9dc7f56310.pdf
    • http://files.pioneerclaytargetclub.com/uploads/1/3/1/4/131437123/tonew-repuzedex.pdf
    • http://files.galenejackson.com/uploads/1/3/1/4/131437308/6145753.pdf
    • http://files.rnbreptiles.com/uploads/1/3/1/4/131452806/5780847.pdf
    • http://files.rnbreptiles.com/uploads/1/3/
    • https://paramudeba.files.wordpress.com/2020/07/84611806861.pdf
    • https://pusetojax.files.wordpress.com/2020/06/zozasawi.pdf
    • https://rofudenubo.files.wordpress.com/2020/07/begedupivutisub.pdf
    • https://josikib.files.wordpress.com/2020/07/69703949301.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/lerofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/73176008535.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/gekotalunogorefopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/86012914964.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.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_off000077cd.bin
ee6a71d7610df6c9acc2dc485a2e7e7b0f003de10c1cbe6affa43df7b71d4ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 5992 bytes
font_01_sfnt_off00008c22.bin
fdd563c4cea418427ed4424ec6661081d4e442595ac9db50047418b7935b0744
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C22 10392 bytes