Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ceee6dce1ec70a…

MALICIOUS

PDF

53.6 KB Created: 2020-08-06 15:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9036aba00b65169c612f75a1fab2e7d SHA-1: 58a68396887452e89add002215e45068162fd21b SHA-256: 55ceee6dce1ec70aae0e1610bc5fb3306bdc296bb75aabc3a3a3218517987c19
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that host PDF files. One of these links, 'https://ttraff.cc/pify?keyword=autoimmunity+notes+pdf', is identified as a malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=autoimmunity+notes+pdf
    • http://files.noltextruss.com/uploads/1/3/1/4/131406036/kukogos-bejinijebewuni-berudiliro.pdf
    • http://files.thecostaricakid.com/uploads/1/3/0/8/130874588/8100817.pdf
    • http://files.khairart.net/uploads/1/3/0/8/130874163/7e050233ed.pdf
    • http://files.ggatravel.com/uploads/1/3/1/4/131407898/5472f2a5144d7c7.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/99677990056.pdf
    • https://cdn.shopify.com/s/files/1/0435/8435/6509/files/raginirugexijujep.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/3166353316.pdf
    • https://cdn.shopify.com/s/files/1/0428/2780/8935/files/18719950406.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/forife.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/legibibezot.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/24786554049.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/47646530851.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/form_mv_44.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/1097849453.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/34934294744.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/98739304951.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/36761384038.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087aa.bin
1097fd097ae80c9f1bebd0e0bcebfa790ea8086f7dd6a88c7fcb183e9edf3811
pdf-font-stream PDF embedded font (sfnt) at offset 0x87AA 4820 bytes
font_01_sfnt_off0000980a.bin
7d710a8f83ba7cdf52a580d21e43d3b97e1607be6361c44e55a5facedcbf5fff
pdf-font-stream PDF embedded font (sfnt) at offset 0x980A 10320 bytes
font_02_sfnt_off0000bb56.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB56 4324 bytes