Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cfc644e1b91110…

MALICIOUS

PDF

36.4 KB Created: 2020-08-15 06:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e15490ae56d5b568214ea9b4954d3f SHA-1: aa51406db7494163220b9838bd8f2a4c166602e8 SHA-256: 43cfc644e1b91110f2a505ae61d973028cbbd98b3805c3fb2dd8e59af704d694
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm pointing to multiple PDFs, with the primary redirector URL being ttraff.com. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. The presence of numerous external links suggests an attempt to lure users to potentially harmful websites.

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.com/pify?keyword=n.+o.+v.+a+game+free
    • http://pakavina.damessential.com/uploads/1/3/0/8/130813988/jiwaxi-duwefejaloluba.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/11609306627.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8898/files/melobuvetimejora.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/3096783871.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xorufolikuvuzinekotawoxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/xupamaralukibugalilawoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/memory_andrew_lloyd_webber_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/vuzoburavarobovaxaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/ziperan.pdf
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/73446628353.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/top_10_interview_questions_and_answers_for_freshers.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_off000051a7.bin
6a37d75e2ca2371447f722f38fb6dc5101d63208ba712689f1fcd87b333e6131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A7 4936 bytes
font_01_sfnt_off0000627b.bin
4ff39273b9edcaceb957caa4a8eaf988969564ef81bad3193b02d71ae80d6d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 10212 bytes

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