Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c46b0c26c3113aa…

MALICIOUS

PDF

46.2 KB Created: 2020-07-20 06:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246afbc4f07bb09642383e0a98a92efe SHA-1: 828f27d2af281e62929f442a64e459aad27fe627 SHA-256: 2c46b0c26c3113aa9e77373b7c82283f555d4dbcb298d432c6e5e57c6e5c1e76
142 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=cbc%20assessment%20rubrics%20pdf'. It also exhibits characteristics of a link farm, with numerous embedded URLs. The document body, though heavily obfuscated, suggests a lure related to 'cbc assessment rubrics pdf'. The presence of a callback phishing lure heuristic further supports the malicious intent.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=cbc%20assessment%20rubrics%20pdf
    • http://files.weiconsultants.com/uploads/1/3/1/1/131163684/witulazugakadulete.pdf
    • http://files.saffronsunhealingarts.com/uploads/1/3/0/9/130969811/2912223.pdf
    • http://files.coxevolab.org/uploads/1/3/1/3/131380733/b435077a189.pdf
    • http://files.iamnabia.com/uploads/1/3/2/6/132695332/7657862.pdf
    • http://files.iamnabia.com/uploads/1/3/2/6/132695332/7657862.pd
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/18232718288.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/pevikujufogosoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/turuwifuganalagerolojuxaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://dakuxutilame.files.wordpress.com/2020/07/83252589186.pdf
    • https://sarekuxiwaz591622790.files.wordpress.com/2020/06/kutivaxateduridi.pdf
    • https://rudukaleditu308957543.files.wordpress.com/2020/06/7552647731.pdf
    • https://riwebaf.files.wordpress.com/2020/06/getejutulupoluniwomexop.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/33293429458.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/97916528363.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/vevixemab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0429/3872/8611/files/38863249859.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/wejozefi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3721/2319/files/68062662127.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/lokag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/57474735226.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_off00006c0a.bin
f10556f5859454a4b3480754407a0ba5ceb2ec8bf9278bf02bc81ff5ce9efe28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 5204 bytes
font_01_sfnt_off00007d98.bin
0820add442df8d78ef720b1d9b7b82382e0dc547f8792733ad6ec20138ff10ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D98 14536 bytes

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