Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4cc0a1b9a0d0e9…

MALICIOUS

PDF

47.5 KB Created: 2020-08-09 03:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbc8736b38c52c72c5f78f93eef9627 SHA-1: 882a16e8aa883acbc2eea845de9ec388f683c8bd SHA-256: fc4cc0a1b9a0d0e9fc96e62d76176f349321d7bc4d8187d7bc93e775e532fd67
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used in SEO link farms to manipulate search engine results or redirect users to malicious sites. One of the primary URLs, 'https://ttraff.cc/pify?keyword=acidosis+respiratoria+cronica+pdf', is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains the same URLs, reinforcing the malicious intent.

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=acidosis+respiratoria+cronica+pdf
    • http://files.alexisburleson.com/uploads/1/3/1/4/131408432/maxazixisonefusinisi.pdf
    • http://files.maydaystudio.com/uploads/1/3/1/4/131406444/mowimeta.pdf
    • http://files.iolabaptisttemple.com/uploads/1/3/2/8/132814305/numozejuno.pdf
    • http://files.travel-post-repeat.com/uploads/1/3/1/8/131856050/kufutam.pdf
    • http://files.forgiveninchrist.net/uploads/1/3/2/6/132696174/f18bdad0d.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/35762278962.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/fixejovin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/4607987350.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/nuladojoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/maxikakelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/11660791019.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/wupopuraniwijazefena.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/59347397491.pdf
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/laravel_composer_intervention.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/17389760048.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/5738413072.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_off00007320.bin
8a136911b1bf3cdf13d8ae401689848eabc33b4dddbefc9f3724f43ea774c98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 5104 bytes
font_01_sfnt_off00008490.bin
b96f1026db09b7e5d03515ab0ab3076a7f162fbc003014005c347f41d60b8716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8490 13372 bytes

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