Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc96489dabe1c80…

MALICIOUS

PDF

46.3 KB Created: 2020-08-21 22:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ea413c4902b45e52b4195685bf4aed9 SHA-1: 14a590f4fecd3a26d08378ef2dd5230a64644b89 SHA-256: 4dc96489dabe1c8089490c90e085b2194170de5b89f3379937e3bc0cd784e895
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to improve search engine ranking and direct traffic to malicious sites. The primary malicious URL identified is ttraff.cc, which is used as a redirector. The file's purpose appears to be to drive traffic to this malicious infrastructure.

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=angular+6++file+from+assets
    • http://files.sarahdronfieldproofreader.com/uploads/1/3/0/7/130740391/kozakifuvul-bepixukaxorave.pdf
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/22110860023.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/genawixoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/acknowledgement_page_for_thesis_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/77104033626.pdf
    • https://cdn.shopify.com/s/files/1/0436/2957/6352/files/medical_surgical_nursing_ebooks.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/walametuxupalizeberuwavar.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/guwirek.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/66447116606.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/sesukiwaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/62574917552.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/mapajidarukuvusisalaxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/fasoramurekafomato.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_off00006a58.bin
f64b84eb4044efda1fc60546c501e368884c97dd4996bca07eb32ec23d138ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A58 5232 bytes
font_01_sfnt_off00007c0c.bin
c7583b2a643acf608548da0f0efc60680d7e8dcfcfd27409df72078cc5572a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0C 15328 bytes

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