Malicious PDF — malware analysis report

Static analysis result for SHA-256 93434e28f8dce82c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-18 17:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b76fac03463199e53f56eda8d0d4e95 SHA-1: 62e119575710719cb38a2f2716a9d31935fc59fa SHA-256: 93434e28f8dce82c6c19f65228ece4e45b951e5ff5957fc639ac26ac7436e26c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a deceptive document body masquerading as an 'Nso marriage certificate application form'. It embeds multiple links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=nso+marriage+certificate+application+form'. This suggests the document's primary purpose is to trick the user into visiting this malicious URL, likely leading to further compromise. No scripts were extracted, but the presence of a malicious redirector and a link farm points to a phishing or social engineering attack.

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=nso+marriage+certificate+application+form
    • http://files.alexandrabroches.com/uploads/1/3/1/3/131398605/toferuvasu_ribepobagelip_pizumu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1602/files/55831725484.pdf
    • https://cdn.shopify.com/s/files/1/0428/8711/9007/files/71723699821.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/61622173773.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/55971113243.pdf
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/70667836912.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/git_update_remote_branches.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/all_auxiliary_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/87385088667.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4161/files/test_para_medir_ansiedad_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/braden_risk_assessment_tool.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_off00005f11.bin
86b8355e7423d5ab3071f7cd6adca538857e61f719565ca4da9df9aa090814f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F11 5304 bytes
font_01_sfnt_off0000710a.bin
d2a725aaf1cc9bd1df7488f38c0c1b613109c0673ab5a01f5febcb648fb5e8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710A 10640 bytes

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