Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c744aa513147362…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 11:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b333be5b8544d59b50e5276935b35af8 SHA-1: 3cf8b9161f10186e90fd6f6d39b7f1dcb39576b0 SHA-256: 8c744aa513147362fe88f9178cf1745ac49566b52fc3db427ea019f09dea46d1
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=agenda+tributaria+maio+2020+pdf'. This URL is likely used to lure the user into downloading further malicious content or phishing for credentials. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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=agenda+tributaria+maio+2020+pdf
    • http://files.agateweb.greatwebsitebuilder.com/uploads/1/3/0/8/130813320/timolebimasifut_gexivobezinuw_kololixev.pdf
    • http://files.ndtyacht.com/uploads/1/3/2/6/132681033/6eb38d508.pdf
    • http://files.gdioneducator.com/uploads/1/3/1/4/131453946/jejaxajiwukenajoledi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/efek_samping_obat_analgetik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/tagajaxinagasinobowafog.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/bantu_education.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/sorikiwax.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/tolexizuvokumijuponon.pdf
    • https://cdn.shopify.com/s/files/1/0435/2825/7685/files/berofir.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/midibizekal.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/devisudipobano.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/nivazadibodan.pdf
    • https://cdn.shopify.com/s/files/1/0435/8435/6509/files/panabinejuzivexutuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/86890950545.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_off000062a4.bin
16ccc9ad2e506a64d6915035ef37514ced47f739292d97e1875924da05ead3b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A4 5436 bytes
font_01_sfnt_off000074ff.bin
3481dfd1defdf54dd838eb7fc6d3e8353a2353254766d16c7d899d70a4844708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 11184 bytes
font_02_sfnt_off00009aea.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEA 4324 bytes

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